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The global shift towards a clean-energy system is much more than just a technological switch – it is a profound transformation of markets, industries and societal behaviours.

This complex undertaking is often characterised by “non-linearity” and “feedback loops”, where small changes can go on to have disproportionately large impacts and where seemingly straightforward paths encounter unexpected roadblocks.

Interventions can be self-amplifying – leading to runaway change, or they can be self-defeating – when progress seems impossible to attain.

Our new policy brief sheds light on these intricate dynamics, which can be overlooked when governments use analytical frameworks based on standard economic thinking.

The brief sets out the most common archetypes of system change and behaviour, as well as the underlying feedback loops that drive them, with the aim of helping policymakers to understand the recurring patterns that can either accelerate or impede progress.

Governments that can recognise these patterns – as well as the ways they can be harnessed or sidestepped – are likely to be better equipped to manage structural change.

This article delves into three key examples from the policy brief, exploring how they are influencing the energy transition and what lessons can be drawn for effective policymaking.

Reinforcing feedback loops

At the heart of the energy transition lies a powerful engine: the reinforcing feedback loops inherent in the development and diffusion of many clean-energy technologies.

This virtuous cycle operates through several mechanisms.

First, “learning by doing”, which means that as more units of a technology, such as solar panels or wind turbines, are produced and deployed, manufacturers and developers become more efficient, processes are refined and costs fall.

Second, economies of scale kick in: as production volumes increase, unit costs decrease due to efficiencies in manufacturing and more developed supply chains.

Finally, wider deployment can trigger network effects and the emergence of complementary innovations. This means that as the adoption of a given technology grows, it can foster an ecosystem of supporting infrastructure, skilled labour and supporting technologies, which can further boost its attractiveness and viability.

Together, these three elements create a powerful reinforcing loop: initial investment drives innovation and cost reduction, which spurs increased demand, attracting further investment.

Solar photovoltaics (PV) and wind turbines are prime examples of this dynamic.

The astonishing growth of solar offers a particularly vivid illustration of the way in which reinforcing feedback loops can blindside experts and policymakers alike.

Solar growth has far exceeded projections made in the early 2000s. Indeed, the world’s actual installed capacity in 2020 was over 700 gigawatts (GW), more than ten times the level expected in outlooks published in 2006, as shown in the figure below.

Actual and projected global solar capacity from 2004 to 2030, gigawatts. Actual deployment is shown by the emboldened navy line, while the greyed lines show outlooks for future deployment published in successive years. Source: Max Collett, adapted from Beinhocker et al. (2018). Data from International Energy Agency World Energy Outlook (2006-23); projections from Stated Policies Scenario or equivalent.

Global solar deployment has exceeded expectations due to disparate trends and drivers in individual markets that, together, all point in the same direction. China, for instance, met its 2030 target for wind and solar capacity six years ahead of schedule in 2024.

Batteries are also riding this wave, with costs plummeting by around 85% over the past decade as deployment, particularly in road transport, scales up.

However, not all clean-energy technologies benefit from this self-amplifying pattern.

Nuclear power and hydropower, for example, have historically not shown the same rapid cost declines, due to their large, complex and site-specific nature. This contrasts with the smaller, modular and replicable characteristics of technologies, such as solar PV.

This does not negate the potential role of such technologies, but it does mean that they are less likely to see disruptive, exponential and self-reinforcing growth.

There are a number of potential conclusions for policymakers.

Early in the transition, interventions such as feed-in tariffs and public procurement were crucial in kick-starting these reinforcing feedbacks for solar and wind.

As these technologies mature and become cost-competitive, the focus shifts to removing other barriers, such as streamlining permitting processes, investing in grid expansion and reforming markets so they are better able to integrate variable renewable output.

These same principles could now be applied to newly emergent clean-energy technologies. Policies that directly nurture these reinforcing loops, such as deployment subsidies and clean technology mandates, can be expected to be most effective in the initial stages.

Turning again to the example of solar energy, while such initial efforts appeared to be expensive, they paid off over time by unlocking future cost reductions and, thus, kick-starting the self-amplifying feedback loops that are now driving further progress.

This contrasts with the idea that carbon pricing is necessarily the most efficient policy for decarbonisation. It may well be helpful, but as it will not drive rapid early technology adoption, it is less likely to have a self-amplifying effect in the initial stages of the transition.

Renewable ‘cannibalisation’

While the growth of renewable energy is the driving force of the energy transition, another system dynamic, termed “renewable cannibalisation“, can act as a dampening feedback loop. This can potentially slow progress long before full decarbonisation is achieved

This cannibalisation process results in variable renewable energy (VRE) sources, such as solar and wind, receiving decreasing prices for the electricity they generate.

Essentially, the more solar and wind capacity that is connected to the grid, the more they undermine their own revenue. This happens through three main channels.

First, the merit order effect, whereby solar and wind, which have very low operating costs, push more expensive fossil-fuel generators out of the market when supply is abundant.

In markets with marginal pricing, this leads to lower wholesale electricity prices during periods of high renewable output. While this cuts prices for consumers – at least in the short term – these lower prices also reduce revenues for renewable generators, potentially undermining the economic case for further investment.

For example, in California, solar power unit revenues fell by $1.30 per megawatt hour (MWh) for each percentage point increase in solar penetration between 2013 and 2017.

Second, price volatility, where uncertainty over future trends in the generation mix and the balance between supply and demand can make long-term revenues difficult to predict.

This increased uncertainty can raise the cost of capital for new renewable projects, again acting as a brake on investment

The UK, for example, experienced this before the introduction of “contracts for difference” (CfDs), which helped stabilise revenue expectations for renewable developers.

Third, volume risk, where rising VRE capacity increases the likelihood of more frequent curtailment – periods when renewable generation exceeds demand or grid capacity, forcing generators to scale back output and lose potential revenue.

Curtailment in itself is nothing new, but the scale and frequency is changing. Recent analysis by University College London suggests that without significant flexibility or storage, UK renewable generation could exceed demand for more than 50% of the time by 2030.

The analysis found that installed wind and solar capacity is set to surge beyond current levels of electricity demand, as illustrated in the figure below, finding that this could “deter investment” in new projects if no action is taken to address the problem.

UK wind and solar capacity is set to significantly exceed current demand
Annual installed capacity of wind and solar, in gigawatts, showing both historical figures and predicted capacity out to 2050. Source: UCL analysis.

These dampening feedback loops illustrate a classic “limits to success” scenario. The very success of renewables, if unmanaged, can create conditions that hinder their continued expansion.

The policy implications here are nuanced. One solution is CfDs, which offer renewable generators a fixed price and have been effective in many countries at mitigating the merit order effect and price volatility, thus maintaining investment.

However, as VRE penetration becomes very high and surplus generation becomes a regular occurrence, other solutions are likely to be needed. This is because existing CfD designs often include clauses that stop payments when market prices drop below zero.

As a result, alternative CfD designs, guaranteeing revenues based on installed capacity or potential – rather than actual – electricity generation might be considered, for example, even though these have other drawbacks.

More fundamentally, our research suggests the solution to this challenge lies in fostering the co-evolution of renewables with technologies such as energy storage and green hydrogen production. These can absorb surplus generation and turn a problem into an opportunity.

Whereas, traditionally, it might be assumed that the market on its own can optimally allocate risk, research suggests that a redesign of market structures may be needed to enable investment and fully realise the cost-saving opportunities of the new technologies.

This is one of several sets of feedbacks discussed in a separate new report published today, looking at the power sector transition in China.

The power of connection

The energy transition is not a series of isolated changes in different sectors. Instead, it is an interconnected system, where progress in one area can catalyse shifts elsewhere. Shared technologies can create reinforcing feedbacks that accelerate decarbonisation across multiple fronts, generating cross-sector synergies.

The relationship between clean power and transport electrification is a powerful example of this. As batteries are deployed at scale in electric vehicles (EVs), their costs fall, enabling ever-wider deployment and further cost declines, as shown in the chart below.

This is due to the learning-by-doing and economies-of-scale feedbacks discussed above.

Falling battery prices have triggered a surge in installations
Average battery pack costs between 2014 and 2024, in dollars per kilowatt hour shown on the left hand chart. Battery storage capacity additions in gigawatts, shown on the right hand chart. Source: Ember analysis of BNEF and IEA data.

This cost reduction then makes batteries more viable for grid-scale energy storage, which, in tur, helps integrate more low-cost VRE into the power system.

Cheaper, cleaner electricity then further incentivises the electrification of transport, as well as heating and light industry. This increased electrification boosts demand for renewable power, driving further deployment and cost reductions in solar and wind. It also expands the potential for demand-side response, where consumers adjust their electricity use to help balance the grid.

A similar dynamic is anticipated for “green” hydrogen. As deployment in one anchor sector – perhaps fertilisers or refining – drives down the cost of electrolysers, it makes green hydrogen more competitive for other applications, such as shipping or even long-duration energy storage in the power sector.

Each sector’s adoption of green hydrogen contributes to the shared learning and cost reduction, benefiting all.

The policy implications of these cross-sector synergies could be significant. Their existence suggests, for example, that there is no need to wait for decarbonisation of the power sector to advance further, before beginning the electrification of transport, heating or industry.

This is in contrast to the argument that transport should only be electrified after cutting power sector emissions, since increased EV charging will drive up demand for gas- or coal-fired generation.

While there will be a marginal increase in emissions from plugging a new EV into the power grid, the insights described in our brief imply that it is still likely to be more effective to pursue the transition away from fossil fuels in multiple sectors in parallel, because it can activate beneficial cross-sector feedback loops that are greater than the sum of their parts.

As such, our research suggests that policymakers hoping to take advantage of cross-sector synergies could aim to deliberately strengthen technological linkages between different parts of the energy system. Examples include electricity tariffs and market structures that reward “smart” EV charging and vehicle-to-grid (V2G) services, encouraging industrial participation in demand-side response and promoting integrated home energy systems. These interactions can amplify the benefits of early investment in the transition.

Policy insights from system dynamics

Archetypes such as the self-reinforcing growth of clean technologies, the potential for renewable cannibalisation, the accelerating power of cross-sector synergies and seven others described in our new report paint a picture of a transition that is far from linear. Instead, we find that it is governed by complex interdependencies and feedback loops.

Consequently, our research suggests that policymakers will be much better equipped to manage and steer the transition, if they adopt a systems thinking approach.

Recognising these recurring patterns allows for the design of more robust and effective policies that anticipate challenges and leverage opportunities.

For instance, understanding the power of reinforcing feedback loops in technology diffusion underscores the value of early-stage support for nascent clean-energy technologies.

Conversely, anticipating the dampening effects of renewable cannibalisation highlights the likely benefits of combining renewable buildout with evolving market designs and strategic investments in flexibility solutions, such as storage and demand-side response.

Policymakers that understand and work with these dynamics are likely to be in a better position to spark self-amplifying changes – achieving maximum value for minimum effort – and to avoid self-defeating interventions that go nowhere.

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Why the transition beyond fossil fuels depends on cities and collective action

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Irene Vélez Torres is Colombia’s Minister of Environment and Sustainable Development, and Mark Watts is Executive Director of C40 Cities.

The science is unequivocal. The world must transition away from fossil fuels. What remains uncertain is whether our institutions, economies and political systems are prepared to deliver the transformation required at the necessary speed and scale.

For too long, this transition has been framed as a technological substitution challenge. Replace fossil fuels with renewables and the problem is solved. But this view overlooks a deeper reality. Fossil fuels are embedded in economic systems shaped by extraction, inequality, and dependence. Moving beyond them requires structural transformation, not only of energy systems, but of the way economies are organised and governed.

This is both a global and a territorial challenge. And it is precisely at the intersection of national leadership and urban action where the transition becomes real.

Today, the energy system accounts for more than three-quarters of global greenhouse gas emissions, while fossil fuel expansion continues despite clear scientific warnings. This contradiction reflects entrenched financial and institutional incentives that continue to favour short-term extraction over long-term stability.

Recent global crises have exposed the consequences. Volatility in fossil fuel markets has translated into rising energy costs, fiscal pressure and growing inequality. A system that depends on geopolitical instability cannot guarantee reliable or affordable energy for people. Nor can it sustain resilient economies.

    This is why Colombia has argued consistently in international spaces that the transition away from fossil fuels is not only an environmental necessity, but a matter of justice. It requires moving beyond an extractive model toward economies that protect life, redistribute opportunity and recognise the value of territories and communities.

    In Colombia, the challenge is immediate. Fossil fuels represent a significant share of exports and public revenues, and entire regions depend on these industries. Addressing this reality demands deliberate strategies to overcome economic dependence, manage fiscal constraints, and enable productive re-conversion without reproducing new forms of extractivism.

    But this transformation will not be delivered by national governments alone. Cities are not just implementers of policy. They are strategic actors in reshaping demand, accelerating innovation, and demonstrating that a different model is already possible.

    Cities turn climate goals into real-life improvements

    Urban areas account for the majority of global energy use and emissions. Yet they are also where the benefits of the transition are most immediate and visible. From expanding clean public transport to reducing air pollution, from improving energy efficiency in buildings to scaling decentralised renewable systems, cities are turning long-term climate goals into tangible improvements in people’s lives.

    Across the C40 network, cities are already reducing emissions while strengthening economic resilience. These experiences show that transitioning away from fossil fuels lowers costs, improves public health and creates jobs. They also demonstrate something equally important: that climate action, when designed around people, can rebuild trust in public institutions.

    Solar surge kept fossil electricity flat in 2025 as China and India made ‘historic’ shift

    The Mayor of London has delivered the world’s largest clean air zone. Melbourne has enabled new wind farms that now supply 100% of municipal operations. In Curitiba, solar investments are cutting public energy bills by 30% while creating inclusive jobs.

    Johannesburg’s US$140-million green bond, oversubscribed by 150%, has mobilised strong investment into clean energy and efficiency projects. And in Colombia, Bogotá established a low-emission zone (ZUMA) in a vulnerable neighborhood, improving air quality and public health for nearly 40,000 people.

    A solar farm near the Brazilian city of Curitiba (Photo: C40 Cities)

    A solar farm near the Brazilian city of Curitiba (Photo: C40 Cities)

    These actions are part of a shared global effort to halve fossil fuel use in C40 cities by 2030, a goal that is not only achievable but already in motion. Crucially, it also contributes to the global target of tripling renewable energy capacity by the end of the decade, set by nearly 195 countries at COP28.

    This is what makes cities indispensable to a just transition. They operate closest to citizens, where energy systems intersect with daily life. They are uniquely positioned to ensure that the transition is not only fast, but fair.

    Structural barriers to national and urban action

    At the same time, cities cannot act in isolation. Their ability to lead depends on national frameworks that align policy, regulation and investment, as well as on an international system that enables rather than constrains transformation.

    And this is where the global dimension becomes critical. Many countries in the Global South face structural barriers, including high borrowing costs, debt burdens and legal frameworks that limit policy space. Reforming the international financial architecture, expanding access to affordable finance, and addressing constraints are essential to unlocking both national and urban climate action.

    Recognising this, Colombia and the Netherlands are convening the First Conference on Transitioning Away from Fossil Fuels in Santa Marta. This is not a space for abstract commitments. It is a platform for implementation, designed to bring together those ready to move from ambition to action.

    To phase out fossil fuels, developing countries need exit route from “debt trap”

    Crucially, the conference places cities and subnational governments at the heart of this effort. Alongside national governments, civil society, workers, Indigenous peoples and the private sector, cities will help identify concrete enabling pathways to advance a just, orderly and equitable transition.

    These pathways are not theoretical. They focus on three interconnected priorities: transforming energy supply and demand, overcoming economic dependence, and strengthening international cooperation. What cities bring to this agenda is the capacity to operationalise these priorities, translating them into policies that reshape infrastructure, mobility, housing and local economies.

    Energy transition means redefining development

    The objective is clear. To build a coalition of countries and cities willing to move forward, not by negotiating new principles, but by implementing them. A coalition that reflects a shared understanding that the transition must be grounded in equity, democratic participation and real delivery.

    What is at stake goes beyond energy. It is about redefining development in a way that is compatible with climate stability and social justice.

    The costs of delay are already evident. Continued investment in fossil fuel expansion deepens climate risk, economic vulnerability and inequality. By contrast, accelerating the transition opens pathways for more resilient, inclusive and sustainable economies.

    Cities are already showing what this future looks like. National governments can scale it. International cooperation can enable it.

    From Santa Marta, the message is clear. The end of the fossil fuel era is not only necessary. It is already underway. The task now is to ensure that it is just, that it is coordinated, and that it is irreversible.

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    Cuts to Renewable Energy Research in Energy Department’s Budget Irk Senate Democrats

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    Although the department’s overall budget will increase in 2027, the amounts dedicated to environmental management, research and renewable energy infrastructure face significant hits.

    Democrats on the Senate Energy and Natural Resources Committee have challenged the Department of Energy’s proposal that would divert funds from solar and wind while keeping fossil fuel plants online past their retirement dates.

    Cuts to Renewable Energy Research in Energy Department’s Budget Irk Senate Democrats

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    Cropped 22 April 2026: Global food ‘catastrophe’ | BECCS emissions | UK solar farm controversy

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    We handpick and explain the most important stories at the intersection of climate, land, food and nature over the past fortnight.

    This is an online version of Carbon Brief’s fortnightly Cropped email newsletter.
    Subscribe for free here.

    Key developments

    Food ‘catastrophe’

    FAO WARNING: On Monday, the UN Food and Agriculture Organization (FAO) warned that a prolonged closure of the strait of Hormuz could lead to a “global food catastrophe”, reported Al Jazeera. With 20-45% of the world’s key agrifood inputs dependent on the sea passage, the outlet explained, poorer countries would be the “most exposed”, with delays in accessing fertilisers “quickly translating into lower output”. A Financial Times essay detailed how the Gulf region has come to “sit at the centre of modern agriculture” over the past two decades”.

    Subscribe: Cropped
    • Sign up to Carbon Brief’s free “Cropped” email newsletter. A fortnightly digest of food, land and nature news and views. Sent to your inbox every other Wednesday.

    ‘PERFECT STORM’: The FAO also warned countries to “not limit shipments” of energy and fertilisers, warning that such restrictions have led to food price spikes in the past, wrote Bloomberg. The UN body asked countries to “closely ponder” biofuel mandates, given the choice between high oil prices and curtailing global food supplies. In a statement, FAO chief economist Dr Maximo Torero warned of a “perfect storm”, if the world is also affected by a strong El Niño.

    COUNTRIES RESPOND: Sri Lanka, already “burdened with old fertiliser debts”, has promised to provide fertiliser subsidies to farmers, reported Sri Lanka’s Sunday Times. In India, “fear of a fertiliser shortage is particularly heightened”, wrote Scroll.in. In Australia – where 60% of urea comes from the Persian Gulf – the war could herald a fertiliser “manufacturing comeback”, reported ABC News. Reuters looked at how China is “clamping down on fertiliser exports to protect its domestic market”.

    Study: Wood vs gas burning

    BASHING BECCS: A new study found that “bioenergy with carbon capture and storage (BECCS) is unlikely to generate negative emissions within 150 years”. The paper added that BECCS is likely to “produce higher emissions for decades than using natural gas without carbon capture” and to “increase electricity costs by ~3.5-fold”. The Guardian covered the research, stating that its findings “cast doubt” on government plans to offer subsidies for carbon capture attached to wood-burning power, such as the UK’s Drax power station.

    INTERPRET WITH CAUTION: Prof Joana Portugal Pereira, an assistant professor at the Federal University of Rio de Janeiro, told Carbon Brief that the study is “clearly framed and the modelling approach is transparent”. However, she said the results are “very sensitive to the assumptions made” and advised “caution” in drawing conclusions from the analysis. For example, she noted that the study “focuses on BECCS supplied from existing forests”, which is likely to “emphasise higher emissions outcomes”.

    MISLEADING HEADLINE: Dr Isabela Butnar, a lecturer in environmental policy at University College London, praised parts of the methodology and agreed that “forest-based BECCS for electricity is a no-go”. However, she argued that the title of the paper – “Decades of increased emissions from forest-fuelled BECCS” – might be “a bit misleading”. The title should specify that the analysis only applies to BECCS for electricity production, she said.

    News and views

    • TOO HOT TO FARM: A major new joint report by the FAO and the World Meteorological Organization estimated that extreme heat “currently threatens” the livelihoods of more than 1 billion people, with agricultural workers on the “frontlines…absorbing the greatest impacts”. Farmers in much of south Asia, sub-Saharan Africa and central and South America could find it “simply too hot to work” for up to 250 days a year, the report cautioned.
    • PALM READING: Demand for palm oil has “surged as the war in Iran drives countries to build up stockpiles” and “boost” biofuel programmes in response to higher crude oil prices, reported Nikkei Asia. While Malaysian and Indonesian palm oil exports have risen to their “highest level in months”, longer-term supply could be “threatened” by rising fertiliser prices and “high temperatures caused by climate change”, added the outlet.
    • RED LIST: Emperor penguins and the Antarctic fur seal “have joined the list of wildlife endangered by global warming”, according to the International Union for Conservation of Nature’s (IUCN) Red List, reported the New York Times. Conversely, “iconic” blue-and-yellow macaws have returned to Rio de Janeiro after a 200-year absence, following an ambitious “refaunation” programme, wrote the Guardian.
    • CATTLE CLASS: A new Unearthed investigation found that a major US biofuels producer supplied the UK with “sustainable aviation fuel” derived from “beef fat linked to illegal Amazon deforestation”. Darling Ingredients – the producer’s parent company – denied sourcing tallow from slaughterhouses sourcing cattle from illegal farms in the Amazon. It told the outlet it was “in the process” of requiring suppliers to prove their products were “deforestation-free”.
    • FUND OPEN: On 10 April, Ecuador issued its “first call” for grants to protect 1.8m hectares of the Ecuadorian Amazon using the $460m Amazon Biocorridor Fund, reported EFE Verde. The trust fund is linked to what is considered the “largest debt-for-land nature swap”, added the outlet. [For more on debt-for-nature swaps, see Carbon Brief’s 2024 explainer.]
    • SUPER EL NIÑO: Scientists expect a strong El Niño event to develop by early autumn, driving up global temperatures, according to Carbon Brief’s latest state of the climate update. The analysis said that if a super El Niño develops this year, it is likely that 2027 will top the charts as the hottest year on record. It added that “the latest climate models give a central estimate of 2.2C warming by September – a scenario which would put the world firmly in ‘super’ El Niño territory”.

    Spotlight

    Oxford solar farm under fire

    This week, Carbon Brief unpacks what the UK’s Botley West solar farm development would mean for farmland and biodiversity in the area.

    Planning permission for one of Europe’s largest solar farms has been delayed, after the UK government asked for more time to consider the proposal from the developer.

    Oxfordshire’s Botley West solar farm has been under consultation since 2022.

    If approved, the site – located 80km north-west of London – will deliver 840m watts (MW) to the UK power grid.

    However, the development faces vehement opposition – most notably from the Stop Botley West campaign group, which has said the “vast” solar farm will have “unprecedented” visual impact, drive the loss of “arable farmland” and will “disregard Oxford’s green belt”.

    Politicians frequently use solar farms to score points with their supporters, with some MPs describing the developments as hazards for rural communities and food supply.

    Farmland loss

    Most of the land earmarked for the solar farm belongs to the Blenheim estate – a 12,000-acre expanse surrounding the UNESCO world heritage site of Blenheim Palace.

    Dr Jonathan Scurlock – the former chief climate adviser at the National Farmers’ Union, which represents farmers in England and Wales – told Carbon Brief that the estate rents out much of its land to tenant farmers. However, he added, it is “not terribly good quality farmland”.

    The UK government has a ranking system for agricultural land that is being considered for large-scale development projects, where five indicates “very poor quality” and one indicates “excellent quality”. Developers are generally encouraged to build on lower-quality land, leaving the high-quality land for farming.

    According to the Botley West website, 62% of the land surveyed for the proposed solar farm is agricultural grade 3b – defined as “moderate-quality agricultural land”. The remainder is mostly 3a, defined as “good-quality agricultural land”.

    Many opponents of Botley West argue that the farm will take away vital farmland. However, Scurlock said:

    “Solar is perceived as very challenging to land use and yet the evidence nationally really doesn’t support that…Solar farms do not really represent lots of agricultural land capacity”.

    (A 2025 Carbon Brief factcheck found that golf courses currently take up six times as much land in the UK as solar farms.)

    The developers plan for the solar panels to remain on-site for about 40 years, after which the fields will be returned to use for agriculture.

    Biodiversity gain

    The proposed solar farm has also promised to improve local biodiversity.

    New development projects in the UK must deliver a “biodiversity net gain” (BNG) under a 2024 regulation.

    Developers must arrange for the “biodiversity value” of the land to be assessed, considering factors including the size, quality, location and type of each habitat. They must then ensure that the final project increases this value by at least 10%.

    If the Botley West project is approved, the developers will aim for 70% BNG.

    Prof Alona Armstrong, an energy researcher from Lancaster University, told Carbon Brief that around two-thirds of solar farms in the UK are built on “ex-arable lands”.

    She explained that biodiversity outcomes on solar farms depend on where the farms are located and how they are designed and managed. Much agricultural land is “intensively managed”, with the use of chemicals and farming machinery. In contrast, there is less chemical and machinery use on solar farms, potentially benefiting biodiversity.

    Armstrong added that solar farms are often lined with hedges, which are “really good for biodiversity”, acting as refuges for a wide range of plant and animal species.

    The latest BNG statement for Botley West filed with the government featured a “habitat and hedgerows creation and enhancement plan”.

    The plan included creating 26.5km of new species-rich hedgerow, enhancing 25km of existing hedgerows and developing a range of grassland types within the solar arrays to be managed for conservation.

    Watch, read, listen

    EARTH ANGELS: From protecting Nigeria’s rare bats to pushing higher climate targets in South Korea, Mongabay profiled the six women who won this year’s Goldman Prize.

    CHERRY (BLOSSOM) PICKING: The Guardian reported on the hunt to find a researcher to continue Japan’s 1,200-year record of cherry-blossom blooming dates.

    ‘SOYA REPUBLICS’: A Phenomenal World essay argued that global grain traders in South America’s soya supply chains “sowed the seeds of anti-democratic politics”.
    ZACH IS BACK: Actor-comedian Zach Galifianakis debuted a new Netflix series, called “This is a gardening show”, meant to be an “oddball celebration of the food we eat”.

    New science

    • Preventing the loss of intact biomes, ecosystems and species is the “most critical strategy” to achieve the “nature positive” future outlined in the Kunming-Montreal Global Biodiversity Framework | Frontiers in Science
    • Climate change will lead to “increased pest damage” in North American forests, as “temperature-boosted pest performance” and “climate-induced stress”, such as drought, make trees more susceptible to pests | Nature Ecology and Evolution
    • There are 160m “small wetlands” in “non-forested” parts of the world, which together contribute to 24% of total wetland methane emissions | Nature Climate Change

    In the diary

    • 22-24 April: Eighth meeting of the board for the loss and damage fund | Livingstone, Zambia
    • 24 April: Launch of the 2026 global report on food crises | London
    • 24-29 April: First conference on transitioning away from fossil fuels | Santa Marta, Colombia
    • 5-7 May: Workshop on invasive alien species for Spanish-speaking countries in Latin America and the Caribbean | Panama City

    Cropped is researched and written by Dr Giuliana Viglione, Aruna Chandrasekhar, Daisy Dunne, Orla Dwyerand Yanine Quiroz. Please send tips and feedback to cropped@carbonbrief.org

    The post Cropped 22 April 2026: Global food ‘catastrophe’ | BECCS emissions | UK solar farm controversy appeared first on Carbon Brief.

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