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Welcome to Carbon Brief’s Cropped.
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

Nature at COP28

BIODIVERSITY LINKS: COP28 came to a close last week and the interconnections between climate change and biodiversity featured heavily in the two-week summit. As Carbon Brief noted in an in-depth summary of the event, the global stocktake – the periodic global review of progress towards the aims of the Paris Agreement – contained eight references to “nature” and five to “biodiversity”. It also noted “the urgent need” to address climate change and biodiversity together and meet targets for both “in line” with the Kunming-Montreal Global Biodiversity Framework, the landmark agreement of the 2022 COP15 biodiversity summit. COP28 president UAE and COP15 president China released a Joint Statement on Climate, Nature and People, where countries committed to aligning their national climate plans and their national nature plans ahead of COP30 and COP16, respectively.

FOCUS ON ECOSYSTEMS: The global stocktake also noted the importance of “ensuring the integrity of all ecosystems”, including oceans, mountains and the cryosphere. During the summit, the Guardian reported that, even if the world reaches a phase-out of fossil fuels, achieving the 1.5C target will be impossible if humanity fails to conserve nature, according to Prof Johan Rockström, a leading climate scientist. Speaking to Carbon Brief in Dubai, David Cooper, acting executive secretary of the UN Convention on Biological Diversity (CBD), said that while nature has featured in many pledges and voluntary announcements at climate COPs in recent years, COP28 saw “more recognition in the actual official texts”. This included a greater focus on ecosystems, he said, adding: “What I’d like to see more is greater recognition of the role of ecosystems beyond their role as carbon sinks.”

ROAD TO COLOMBIA: Shortly after COP28 ended, the CBD confirmed that the next UN biodiversity summit, COP16, will be held in a yet-to-be-announced city in Colombia from 21 October to 1 November 2024. Cooper told Carbon Brief that he was “very excited” for Colombia to host the event, as it is a “megadiverse country, it has very strong Indigenous peoples’ organisations [and] a very strong scientific base”. Colombia’s environment minister, Susana Muhamad, said in a statement: “This event sends a message from Latin America to the world about the importance of climate action and the protection of life.” At COP16, governments will review the implementation of nature goals and targets and also update their national biodiversity plans.

Food at COP28

ROADMAP: COP28 “confronted” the question of balancing the need to reduce emissions and to feed a growing population “like never before”, wrote New York Times international climate correspondent Somini Sengupta. She cited a number of “small, but significant steps” made at the summit, from the leaders’ declaration on food systems – covered in the previous issue of Cropped – to the UN Food and Agriculture Organization’s first-ever roadmap to 1.5C. That roadmap is “the most significant nudge” of the summit, the New York Times said, but added: “Roadmaps, of course, are only that until someone starts following the directions.” Action Aid’s climate justice lead Teresa Anderson told Carbon Brief that the roadmap’s “big problem is that it can’t bring itself to name the real issues at stake” and by “failing to name chemical fertilisers, factory farming or industrialised agriculture as the major sources of emissions and deforestation, its recommendations boil down to protecting the status quo”.

WASTE NOT: Among the recommendations in the roadmap is the need to reduce food loss and waste by 50% per capita by 2030, and to integrate all such waste “in a circular bioeconomy” by 2050. According to the not-for-profit Modern Farmer, the US Department of Agriculture released a draft of its new national strategy on food loss and waste at COP28. The announcement was accompanied by an initial investment of $30m and sets out goals for the federal government, including preventing food loss and waste, increasing the recycling of organic wastes and “to support policies that echo those aims”.

TAKING STOCK: Another major outcome for food at COP28 was the inclusion of “resilient food systems” in the global stocktake. Ag Insider noted that, although the stocktake “urges” countries to implement solutions towards resilience, it did so “without setting goals for the sector that produces one-third of global greenhouse gases”. A report published by WWF that assessed COP28’s action on food systems noted that a stocktake “that directly calls for food systems transformation to mitigate climate change would likely lead to higher prioritisation and increased amounts of climate finance for food”. The report said the summit “[fell] short of delivering robust outcomes [for food] in the negotiating rooms”. But, WWF added, “there are still grounds for optimism”, such as “the breadth of stakeholders determined to drive change” in the agrifood sector. 

CONTRADICTORY AGENDA: An editorial in Nature Food cast doubt on Brazil’s ability to drive a sustainable agenda on food and climate after the nation announced its intention to join the Organization of the Petroleum Exporting Countries (Opec+) at COP28. The piece noted that Brazilian president Luiz Inácio Lula da Silva (Lula) “has set the protection of the Amazon and Cerrado biomes as a priority” since regaining office. But the announcement that the country will join Opec+ in January, as well as its intention to auction several new blocks for oil drilling, “had a negative repercussion among environmentalists”. Nature Food noted that COP30 is set to be held in “the heart of the Amazon”, saying: “Domestically, this is an opportunity for Brazil to put itself on a different development pathway, fostering more sustainable food production and managing natural resources in a just and inclusive way.”

COP28 round-up

GLASGOW RECEIPTS: COP26 in Glasgow saw several major political declarations around deforestation. While deforestation was lower on the agenda this year, it achieved one notable first: the global stocktake was the first time the need for “halting and reversing deforestation and forest degradation by 2030” was enshrined in a major negotiated text under UN climate change. But, despite this, “countries are still no nearer to closing the ‘finance gap’ necessary to stop the destruction of rainforests”, Mongabay reported. The outlet added that the Democratic Republic of the Congo “says it has not seen any of the $500m pledged to it two years ago [at COP26] to protect the Congo Basin rainforest”. As Cropped editor Dr Giuliana Viglione reported at COP28, a group of NGOs released a call to create a “Glasgow Declaration Accountability Framework” to hold countries accountable for their deforestation pledges from COP26.

RESTORATION RECOGNISED: The global stocktake underlines the “vital importance of protecting, conserving, restoring and sustainably using nature and ecosystems” and encourages the implementation of nature-based solutions and ecosystem-based approaches, Carbon Brief reported. COP28 saw the announcement of updates to both the Mangrove Breakthrough and the Freshwater Challenge, two global commitments to restoring mangroves and rivers and wetlands, respectively. Another big outcome of the summit was the global goal on adaptation, a framework meant to help countries build resilience to climate change. The text included topics such as water, health and ecosystems, the Spanish outlet Climática reported. But, it added, the global goal on adaptation will not guarantee that 30% of ecosystems will be “maintained, improved or restored”, relying instead on targets such as “reach resilience” or “reduce impacts”.

INDIGENOUS RIGHTS: Despite being the UN climate summit with the largest delegation of Indigenous peoples ever, they remained marginalised in the discussions regarding financing, the Brazilian outlet InfoAmazonia reported. The outlet added that concerns about oil and gas auctions in the Amazon and the arrival of agricultural projects on Indigenous lands overshadowed the result of the summit. Carbon Brief reported that the global stocktake included nine mentions of Indigenous peoples; however, language in the text was considered weaker than hoped by experts. For example, the texts lack recognition of Indigenous people’s rights to give or withhold free, prior and informed consent to approve projects within their territories. 

METHANE ROUNDUP: Several voluntary pledges and finance pushes at COP28 focused on cutting methane emissions – and while many centred on fossil-fuel production, some homed in on food systems and agriculture. On 5 December, six major food companies, including Danone, Nestlé and Kraft Heinz, committed to release information on methane emissions within their dairy supply chains and to put in place methane action plans by the end of 2024. There were also several announcements of funds aimed at cutting emissions of the potent greenhouse gas, including more than $200m in public and private finance for research into reducing methane from livestock.

News and views

JUMBOS IN JEOPARDY: Drought has killed “at least 100 elephants” in Zimbabwe’s largest national park in recent ​weeks, the Associated Press reported. Conservation groups and wildlife authorities have attributed the deaths to “the impact of climate change and El Niño”, while authorities warn that “more could die as forecasts suggest a scarcity of rains and rising heat” in areas including the Hwange National Park. Separately, the Hindu Business Line reported that nearly 500 elephants in India have died from “unnatural causes” over the past five years, mainly due to electrocution and train collisions. India’s power ministry, while continuing to expand its infrastructure in elephant habitat, has issued an advisory to “mitigate the impact of power transmission lines and other power infrastructure on elephants and other wildlife”, the outlet said.

TRILLION APOLOGIES: At COP28, ecologist and former chief scientific adviser to the UN’s Trillion Trees Campaign Prof Thomas Crowther “begg[ed] environmental ministers to stop planting so many trees”, Wired reported. Crowther’s 2019 study that suggested “global tree restoration as our most effective climate change solution to date” sparked a global “tree-planting craze by companies and leaders…from Shell to Donald Trump” who were “keen to burnish their green credential”, but not cut actual emissions, the story said. Crowther told Wired his “message was misinterpreted”. He added that he brought results from a new paper on preserving existing forests to COP28 in an attempt to “kill greenwashing”. One scientist on Twitter commented that Crowther should “retract the [original trillion trees] paper instead of doing PR”. 

START YOUR ENGINES: Tractors took over the streets of Berlin as hundreds of farmers protested against German government plans to get rid of some agricultural subsidies and tax breaks, Reuters reported. The plans are part of wider federal government efforts to fill a €60bn hole in the country’s 2024 budget, the newswire said. The government said it will remove a partial tax refund on diesel for farm machinery and a tax exemption for agricultural vehicles, Reuters noted – adding that this is something “farmers said would threaten their livelihood”. The newswire said that the plans are aimed to reduce emissions from the agricultural sector, which amounted to “55.5m metric tonnes of greenhouse emissions last year, roughly 7.4% of the country’s total”. 

TO BEE OR NOT TO BEE: Indigenous peoples in south-east Mexico are calling for the recognition of bees as legal persons, with Mayan communities as their guardians, the Spanish-language version of Wired reported. This came after rainforests in the region experienced “devastation” due to soya agriculture and the excessive use of pesticides, leading to “more and more” bees dying. Indigenous communities criticised the state for not yet granted such recognition. The outlet said that protecting bees “for their intrinsic value” is an “idea [that] comes naturally” to Indigenous peoples. This would not be the first time that nature received legal recognition, as the constitutions of Ecuador and Bolivia both consider nature as a separate and living entity.

DIET IMPACTS: Halving meat and dairy consumption alongside reducing fertiliser use and food waste are some of the best ways to cut agricultural nitrogen pollution in Europe, a new report found. The report – produced for the UN by the UK Centre for Ecology & Hydrology and other researchers – said that significant amounts of the nitrogen used to boost crop growth ends up leaking into the air, water and soils. The researchers looked at 144 scenarios and outlined ways to reduce these losses, which included halving the amount of meat and dairy the average European eats.

Watch, read, listen

IMPROVING CONNECTIVITY: El Espectador looked at how the movement of 26 bird species helped scientists identify key sites for conserving ecological connectivity in Colombia’s protected areas.

BIODIVERSITY PATTERNS: What makes a place more biodiverse? Jaron Adkins, a scientist at Utah State University, explored this question for Utah Public Radio.

KEEPING PACE: In her newsletter, Sustainability by numbers, Dr Hannah Ritchie examined whether agricultural innovation can keep up with climate change.

ROAD REVAMP: Ben Goldfarb, writing for Yale Environment 360, looked at “green roads” – a way of redesigning roads to reduce floods and catch excess water for irrigation.

FORAGING THROUGH FEAR: Writing for Vittles, anthropologist Dolly Kikon and writer Joel Fernandes connected the dots between land rights, new climate laws, conflict and foraging in landscapes of loss in India’s north-eastern state of Nagaland.

New science

COP28 initiatives will only reduce emissions if followed through

Climate Action Tracker

A new analysis of COP28 pledges found the “plausible” impact of its food and agriculture declaration on global emissions to be around 500m tonnes of CO2-equivalent by 2030. Climate Action Tracker assessed the emissions-reduction potential of five non-binding pledges made at COP28 and the extent to which those pledges overlap with already-promised reductions. The lack of “quantifiable targets in the initiative text” and “targets directly targeting emissions reductions”, result in a commitment “so vague as to risk becoming another talking shop”, the authors wrote. On deforestation, the assessment found that funding declarations in the hundreds of millions of dollars, as opposed to the billions needed to end deforestation in this decade, “are not truly new” and represent a “repeat of the commitments already made at COP26 in Glasgow”. 

Towards equity and justice in ocean sciences

npj Ocean Sustainability

A new review article examined progress towards equity in the ocean sciences and presented a pathway to addressing the gaps that remain in the field. A group of ocean scientists examined dozens of scientific papers on ocean equity and justice. They found that while the community has begun to identify and tackle existing power imbalances in ocean sciences over the past few years, “many issues still need to be addressed”. The authors called for “honest and transparent dialogue”, accompanied by “a significant shift in institutional cultures and norms” from scientists, professional societies, funders and other groups.

Are climate neutrality claims in the livestock sector too good to be true?

Environmental Research Letters

A number of scientific studies have “distorted understanding of the climate impact of livestock production”, a new “perspective” paper suggested. The researchers focused on the use of global warming potential (GWP) metrics, which standardise different greenhouse gases into one CO2-equivalent (CO2e). The “policymakers who wrote the Paris Agreement text” based its goals on “emissions pathways aggregated using GWP100”, the authors explained, which accounts for the warming caused by GHGs over a 100-year period and “does not differentiate between long-lived climate pollutants (LLCPs) and short-lived climate pollutants (SLCPs)”. However, some recent studies “claiming that ruminant livestock sectors in developed economies are, or could readily be, climate neutral” have used the GWP* metric, which “accounts for the effect of changes in the rate of SLCP emissions on warming over time”. While the GWP* is a “useful complement” to other metrics, the claimed states of climate neutrality in specific sectors based on its use are “temporary and are not aligned to the wider outcomes of the Paris Agreement”, the paper concludes.

In the diary

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

The post Cropped 20 December 2023: COP28 special edition appeared first on Carbon Brief.

Cropped 20 December 2023: COP28 special edition

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Every country needs a model to help optimise its energy transition

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Claver Gatete is Executive Secretary of the UN Economic Commission for Africa. Jason Veysey is Energy Modeling Program Director and Senior Scientist at the Stockholm Environment Institute. Lisa Sachs is Director of the Columbia Center on Sustainable Investment at Columbia University.

The case for global energy transition has rarely been clearer. The closure of the Strait of Hormuz earlier this year exposed the cost of unplanned, fossil-dependent systems, while the falling cost of renewables, the rising penetration of electric vehicles, and the growing value of demand flexibility have made the direction of travel obvious. The benefits of a clean, secure, integrated system are no longer in dispute. What remains unclear is how to build it.

Countries around the world have called for faster renewable energy deployment and alternative energy arrangements. A secure, affordable, resilient, decarbonised system requires specific investments in specific places in a specific sequence, optimised across sectors and borders. But very few governments have the analytical foundation to translate those imperatives into investment.

The two instruments that are supposed to determine investment priorities for decarbonisation – Nationally Determined Contributions (NDCs) and country platforms – cannot answer the most basic question facing any country undertaking an energy transition: what should the energy system look like?

    To close this gap, every country needs a bankable, economy-wide optimisation model for its energy system. A model is not a plan, but it can help answer the critical question of what the future energy system should look like. It shows how optimal scenarios vary as assumptions and policies are adjusted, calculates investment requirements and sequencing, and quantifies how system costs are affected by assumptions, policies, and exogenous variables like trade policy and financing terms.

    Tool for efficient investment

    Optimisation is a simplified way of simulating an energy system, but it can be an extremely powerful tool for moving energy planning from reactive (how do we manage the disparate actions in the energy system?) to intentional (what energy system underpins our national objectives?). A model can show how optimal scenarios vary as assumptions and policies are adjusted, and how investment requirements are quantified and sequenced.

    Optimisation models can treat the energy system and the sectors it serves as an integrated whole, optimising across sectors and projects in ways that can be mutually reinforcing. If considered independently, growth in industrial demand, transport electrification, and digital infrastructure can add stress to the energy system. But an optimised plan can arrange these and other changes in an efficient, synergistic way.

    Two to tango: How governments can unlock private investment for national climate goals

    New load can be added where low-cost power is available; industrial customers can ensure the viability of investments in energy supply; electric vehicle charging policy can smooth load curves and reduce costs for all consumers.

    Additionally, optimisation modeling can also change the financeability of investments. Taken alone, each project faces uncertainty about the rest of the system, which raises the cost of capital and causes projects to stall or unwind after contracts are signed. A coherent, optimised plan makes visible the coordination that private capital would otherwise have to bet on: identified offtake, sequenced and committed transmission, contracted power supply, and so on.

    What COP31 and COP32 should do

    The upcoming COPs in Turkey and Ethiopia can shift the center of gravity of international climate cooperation from fragmented commitments to planning. Three moves are urgently needed.

    First, optimised, economy-wide, long-term energy system planning must be the foundation on which any meaningful NDC, country platform, or finance commitment rests. NDCs are typically drafted by environment or single-line ministries, with limited cross-sectoral input from ministries of energy, finance, and planning. They contain targets, derived from sectoral strategies or national commitments, not from an analytically grounded picture of what the energy system should look like and what investments would make it work. Country platforms are generally a portfolio of investments assembled from existing project pipelines, rather than derived from a system-level analysis of what an optimised, decarbonised energy system would require.

    Second, recognise regions as a key planning unit. Modern integrated energy systems are inherently regional. Renewable endowments are unevenly distributed; balancing variable supply across borders lowers aggregate cost, reduces redundant backup capacity, and unlocks economies of scale no individual nation can achieve. Many energy investments in Southeast Asia, East Africa, Southern Africa and Central Asia may only be financeable in a regional context. Assessing domestic infrastructure without regional optimisation perpetuates the perception that decarbonisation is more expensive than it is.

    COP31 leaders unveil global targets, with spotlight on electrification

    Third, finance the planning capacity. A coordinated commitment by multilateral development banks, bilateral donors, and philanthropic partners to help every region and its constituent countries develop and maintain their own modelling capability, with open-source tools and regional analytical hubs, would close the most consequential gap in the current architecture. The cost is small relative to current spending on country platforms, failed project preparation, and misallocated infrastructure investment.

    This includes supporting regional institutions such as the ASEAN Centre for Energy, the African Energy Commission, regional power pools, and the Latin American and Caribbean Energy Organization to determine what optimised regional systems require. Country-by-country pledging, repeated at every COP, will not deliver what meaningfully integrated systems can.

    The 2026 energy crisis made the cost of unplanned, fossil-dependent systems newly visible. That window of clarity will close. The international community should seize the moment to build the planning foundation that has been missing for thirty years, rather than commissioning another round of NDCs or pledges, striving for outcomes neither was designed to deliver.

    The post Every country needs a model to help optimise its energy transition appeared first on Climate Home News.

    Every country needs a model to help optimise its energy transition

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    Explainer: How the ‘super El Niño’ will reshape the world’s weather

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    The world is currently experiencing what is expected to become the strongest El Niño on record – dubbed a “super El Niño” by many.

    El Niño is the warm phase of a recurring climate pattern in the tropical Pacific that releases heat from the ocean into the atmosphere.

    This temporarily raises global temperatures and reshapes rainfall and extreme weather around the world – impacting the lives of billions of people.

    The current El Niño event began in June and is expected to last into 2027.

    El Niño is part of a wider climate pattern called the El Niño-Southern Oscillation (ENSO) cycle.

    The ENSO cycle also has a cool phase, known as La Niña, as well as a “neutral” phase. El Niño and La Niña events typically last between nine and 12 months, but can go on longer.

    Below, Carbon Brief explains how the ENSO cycle works, its impacts on extreme weather and global temperatures and why this El Niño event is projected to be the most intense since records began.

    The post Explainer: How the ‘super El Niño’ will reshape the world’s weather appeared first on Carbon Brief.

    https://interactive.carbonbrief.org/el-nino-explainer/index.html

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    Analysis: The two largest reservoirs in the US have hit record-low levels

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    The second-largest reservoir in the US reached a record-low water height on Saturday – just days after the country’s largest reservoir broke its own record. 

    Both Lake Mead and Lake Powell are located on the Colorado River.

    They provide water for populations across seven US states in the south-western US, with around 40 million people getting some or all of their municipal water from the Colorado River.

    The river also provides water for around 5.5m acres (22,258 square kilometres) of farmland across Colorado, Arizona, California and the other states in the river basin.

    Experts tell Carbon Brief that climate change, population growth and over-consumption are all contributing to the current record-low levels of the reservoirs.

    Record lows

    At full capacity, Lakes Mead and Powell can hold a combined 68 cubic kilometres of water – enough to supply all household consumption in the contiguous US for nearly 1.5 years. However, the water level in both reservoirs has been declining for decades.

    The chart below shows the water level of Lake Mead, in metres above mean sea level. The reservoir, which began to fill in 1935 following the construction of the Hoover Dam, has a “full pool” maximum capacity of 347.60 metres. The water level in Lake Mead reached a record low of 317.11 metres on 7 August.

    Lake Mead, the larges reservoir in the US, reached record-low water levels in early August.

    The following chart shows the water level of Lake Powell, in metres above mean sea level. Lake Powell’s full-pool level is 1,127.76 metres.

    While the reservoir reached its maximum capacity several times in the 1980s, it has not done so since. On 15 August, the water level in Lake Powell was recorded at a new record-low of 1,072.87 metres.

    Lake Powell, the second-largest reservoir in the US, reached record-low water levels in mid-August

    Both reservoirs have continued to decline in the days since breaking their respective records. The downward trend will largely continue in both lakes until next spring, when the snowpack in the mountains of the Upper Colorado River Basin begins to melt, says Dr Jack Schmidt, a senior research scientist at Utah State University’s Center for Colorado River Studies. He tells Carbon Brief:

    “The big dilemma of the moment is that we’re only in the middle of August, and we have no assurance of what the coming winter will be. The only thing we can be sure of is that we will be depleting overall total basin reservoir storage from now until, roughly, early April.”

    Compounding factors

    The record lows across the two reservoirs are the result of several compounding factors, experts tell Carbon Brief.

    Since the turn of the 20th century, the amount of water flowing along the Upper Colorado River has declined by about 20%. Research suggests that half of this decline can be attributed to human-induced climate change.

    Most of the river’s streamflow comes from the snowpack of the Upper Colorado River Basin, which stretches across five western US states but is primarily located in Colorado and Utah.

    This region has been gripped by a historic “megadrought” for more than a quarter of a century. Nearly half of the megadrought’s intensity over 2000-18 is attributable to climate change, according to a 2020 study.

    At the same time, the increasing population in the US south-west has put added pressure on the Colorado River’s water supply. The number of people obtaining some or all of their water from the Colorado system has grown by 15 million (around 60%) since 1992.

    Schmidt tells Carbon Brief:

    “There’s an ultimate cause of the present water crisis, and there’s a proximate cause. The ultimate cause is a warming climate, a warming planet and a pretty clear correlation between warming conditions and decreased runoff in the Colorado River Basin.

    “The proximate cause is that in this messy democratic republic of ours, big policy decisions that match the variability of the climate occur painfully slowly – with intense political negotiations – and only incrementally.”

    On 31 July, the US Bureau of Reclamation, which manages water resources in the western US, released an environmental impact statement on its proposed post-2026 strategy for managing Lakes Powell and Mead. The strategy itself has not been released yet.

    Schmidt notes that the statement does appear to give the Bureau flexibility to “respond to crisis” by reducing the delivery of water to several states. However, he adds:

    “They acknowledge it won’t work if we just stay critically dry, and of course every climate model for the 21st century, especially with a continually warming planet, says that that’s exactly what’s going to happen.”

    The post Analysis: The two largest reservoirs in the US have hit record-low levels appeared first on Carbon Brief.

    Analysis: The two largest reservoirs in the US have hit record-low levels

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