Food systems are responsible for around one-third of the world’s greenhouse gas emissions – and beef has the largest carbon footprint of any food.
Moving diets away from beef and other red meat has become increasingly seen as an important part of mitigating food-related emissions.
But such changes can have unintended consequences, especially for countries that rely heavily on beef production and exports.
In our new study, published in Ecological Economics, we examine the impacts of a gradual reduction in Brazil’s beef consumption on the country’s emissions and economy.
Using an economic model, we find that reducing the average person’s beef intake in line with health recommendations could make up as much as a third of the world’s potential mitigation from dietary changes (according to the UN) – with little impact on Brazil’s overall economy.
Mitigation potential
Research shows that shifts toward plant-based diets can contribute to both mitigating climate change and improving human health.
Meat and animal-derived food production emits more greenhouse gases and consumes more water and land resources than plant-based food production.
Animal-derived food production also results in calorific loss down the food chain. The amount of calories contained in an animal that humans consume is much lower than the sum of the calories of that animal’s food.
For example, of every 100 calories used for sustenance and growth in animals, humans receive between 17 and 30 calories from meat consumption. This loss during the process of raising, processing and consuming animals is due to various factors, including inefficiencies in digestive processes and the physical activity of the animals themselves.
According to the 2019 special report on climate change and land from the Intergovernmental Panel on Climate Change (IPCC), dietary shifts have the potential to mitigate up to 8bn tonnes of CO2-equivalents (GtCO2e) around the world each year by 2050.
In Brazil, approximately 60% of the country’s annual emissions stem from land-use change and agriculture. It is one of the largest beef producers in the world.
In addition, global demand for beef is directly linked to deforestation in the Amazon as forests are cleared to make space for rearing cattle. It is also of global concern, due to the importance of the Amazon as a carbon sink.
Reducing beef consumption
Reducing red meat consumption is crucial not only for mitigating greenhouse gas emissions, but also for improving public health.
Studies have shown that excessive meat consumption can lead to higher rates of cardiovascular diseases, type 2 diabetes and colorectal cancer. According to research from the World Cancer Research Fund and the American Institute for Cancer Research, the ideal limit for red meat – that is, beef, pork, lamb and goat – consumption is up to 300 grams per week per person.
Brazil – along with the US, Australia and Argentina – surpasses this recommended average per-capita meat consumption. Annual beef consumption in Brazil is more than 460 grams per week, according to data from the UN Food and Agriculture Organization and the Organisation for Economic Co-operation and Development.
Thus, in our study, we set out to reach the recommended per-capita average beef consumption by 2050 – a reduction in consumption of 40%.
We test two scenarios to reduce consumption.
First, we look at relative price changes. We consider a situation where taxes on beef are raised over time from the 2015 average rate of around 8% to approximately 40% in 2050. (Existing taxes on beef in Brazil vary, with specific rates set at the state level.) In a related scenario, we consider what would happen if the funds from such a tax were put towards subsidies for lower-carbon foods.
Second, we look at changing consumer preferences. This could require formal interventions, such as information campaigns and the consideration of culture, emotions and morality. However, it could also occur naturally. Our model does not consider the drivers of the change, but recognises that such a change would occur slowly.
Although there is some movement towards reduced meat consumption due to changing consumer preferences, it remains relatively limited and more concentrated in developed countries. Reasons for this shift in preferences may include higher levels of education and income.
However, in Brazil, meat is viewed as a culturally essential food. In addition, regional preferences differ – for example, there is typically a high beef consumption in the northern region of Brazil, where the Amazon is located.
Despite the international attention linking excessive beef consumption to climate change and Amazon deforestation in Brazil, it has had minimal impact on Brazilian dietary preferences.
Modelling impacts
Our study analyses the impacts of a reduction in beef consumption on Brazil’s domestic market.
We focus on impacts on the country’s economy as a whole, effects on individual sectors such as agriculture and industry, regional impacts and deforestation reduction in the Amazonia and Matopiba regions. Matopiba is a region in the Cerrado, a savannah biome where agriculture has advanced in the last three decades.
The map below shows how Brazil is divided between the Amazon (green), the Matopiba region (orange) and the rest of the country (blue).
MAP
We conduct a set of simulations using an economic model for the two regions. In our model, different groups – such as consumers and firms, including investors, agricultural firms, industries and food service – are assumed to make the best decisions based on what they prefer and what they can afford. For firms, the “best decisions” are the ones that minimise their costs, while consumers seek to maximise their “utility”, or satisfaction.
This model represents how the economy works by looking at how people and businesses behave, how they interact in markets, and when the market will reach equilibrium – that is, when supply and demand are balanced.
We use the model to analyse the effects of policies and shocks on different sectors, regions and groups. We present our results as deviations from a baseline trajectory that assumes constant per-capita beef consumption until 2050, with overall consumption growing at the same rate as the Brazilian population.
It is essential to note that the deforestation reduction captured in the model is related to agricultural activity, not to deforestation associated with illegal logging or land grabbing. However, beef and other agriculture drives around 90% of deforestation in Brazil currently, so this is unlikely to significantly change our results.
The latter has various motivations and can be more effectively inhibited through increased environmental monitoring, land demarcation and other mechanisms developed and applied over the last two decades.
Deforestation impacts
We find that a 40% reduction in beef consumption from 2022 to 2050 would help prevent deforestation of approximately 65,000 square kilometres – larger than the area of Sri Lanka.
It also has the potential to mitigate up to 2.8GtCO2e per year, which is one-third of the total mitigation potential from changing diets presented in the IPCC’s special report on land.
The charts below show the amount of avoided deforestation for the Amazon and Matopiba regions relative to the baseline scenario.
Grey and light green indicate lower amounts of avoided deforestation and dark green indicates the highest amounts. The top, middle and bottom maps show reduced beef consumption through changing consumer preferences, a beef tax and a beef tax with subsidies for other foods, respectively.
In addition to deforestation, we considered the impacts that these shifts would have on Brazil’s economy.
Our findings suggest that dietary shifts due to changes in preferences would have virtually no impact on Brazilian GDP in 2050, reducing it by 0.03% – largely due to a slight decrease in investment.
Adjusting diets through an increase in beef taxes would lead to overall cost increases, resulting in decreases in exports and GDP. We find that GDP would decline by 0.64% in this scenario, with exports decreasing by 1.5%.
However, in the scenario where the beef tax revenue is applied to other foods as subsidies, the national GDP declines by only 0.18%, despite similar decreases in exports.
In all scenarios, we find that the economic impacts would differ from one area of the country to the next. In particular, they would affect regions most dependent on the cattle and beef sector, which are also the most directly affected by the proposed taxation policies. In the beef tax scenario without subsidies, two northern states experience declines in GDP of 3% or higher.
Although Brazilians reducing their beef consumption would bring environmental and health benefits to the country, emissions mitigation cannot be solely Brazil’s responsibility. We observe that the reduction in beef consumption through preference changes leads to a negative effect on the domestic price of beef.
This decrease in domestic prices would, in turn, favour Brazilian beef exports, resulting in less mitigation and a smaller reduction in deforestation. Therefore, it is crucial for this change in habit to be followed by other economies worldwide – notably, those that heavily import Brazilian beef, including China, the US and EU.
The post Guest post: How shifting diets away from beef could cut Brazil’s emissions appeared first on Carbon Brief.
Guest post: How shifting diets away from beef could cut Brazil’s emissions
This is a republication of November’s edition of The Climate Agenda – a subscriber-only newsletter designed to keep you informed of the key events, negotiations and announcements happening every month. If you want to receive The Climate Agenda straight to your inbox at the start of each month, sign up as a subscriber today.
COP31 begins in one week, and we’ll have five specialist reporters on the ground in Antalya, Türkiye, bringing you every development as it happens. From the negotiations to leaders’ speeches and side events, we’ll be there to dissect what it all means for international climate policy on electrification, just transition, adaptation finance and much more.
Here’s what you need to know for November, why it matters and what to expect.
US midterm elections
Tuesday 3 November – United States
The geopolitical highlight for the first week of November is the US midterm elections, which will show whether American voters are in any mood to forgive President Donald Trump for failing to bring down the cost of living. From an energy perspective, his pro-oil and gas stance hasn’t led to cheaper prices for consumers, pushed up by the US-instigated Iran conflict. And his diesel deal with Russia won’t yet have made a difference at the pump.
The key issue for climate and energy policy is whether the Republicans hold onto their governing trifecta. If so, then expect continued dismantling of regulations that protect the environment, as well as strong backing for fossil fuel production. If the Democrats regain control of Congress, which polls suggest is possible, it could trigger a push to restore Biden-era clean energy tax credits, and support states wanting to restart mothballed wind and solar projects.
Data centres have been a hot-wire issue, with growing community opposition to their expansion – partly due to concerns over rising utility bills as the facilities gobble power. Whether Republicans or Democrats win Congress, both are likely to make tech firms pay for the extra electricity production they need, with the latter favouring renewable sources.
Governor races are also taking place in key states for climate issues, including Democrat-run California, which has used the courts to fight Trump’s attacks on clean energy.
Read more: National climate plans now promise half the emission cuts expected by UN
Read more: The more Europe relies on the US for energy, the more it’s vulnerable to pressure by Trump
COP30 Deforestation and Fossil Fuel Transition Roadmaps
Tuesday 3 November – Brazil
Brazil is set to unveil two global roadmaps: one for transitioning away from fossil fuels, the other for ending deforestation.
The COP30 presidency promised them in the dying hours of the Belém summit last November as a last-minute fix to break a political impasse. Since then, it has been consulting with countries, experts and campaigners around the world to gather ideas and sketch out the elements to include in these blueprints.
Don’t expect the roadmaps to offer any new global targets or give direct instructions on what countries must do, either to cut fossil fuel production and consumption or better protect forests. Rather, Brazil has said the documents will identify barriers and priority actions, highlight existing mechanisms and present a range of options that can be adapted to different national contexts.
It remains unclear what will happen with the reports once they are delivered on Tuesday. At the Bonn talks last June, a group of European and small island nations called for the roadmaps to be brought into the official negotiations, warning that a one-off report won’t cut it. But such efforts would undoubtedly face stiff opposition from fossil fuel-producing nations that objected to drafting the energy transition roadmap within the formal UN process last year.
Read more: European, island states seek clear future for global roadmap to cut fossil fuels
Read more: COP30 roadmap to end deforestation will invite countries to draft domestic plans
Read more: What we need to see in the roadmap to transition away from fossil fuels
UNEP Adaptation Gap Report
Wednesday 4 November – Nairobi, Kenya
The UN Environment Programme (UNEP) will publish its annual assessment of how well the world is planning, implementing and – crucially – financing measures to cope with worsening climate impacts.
Past editions have made for grim reading. Last year’s report warned of a widening gap between what developing countries need for adaptation and what they can access. It estimated they will need $310–365 billion a year by 2035, which is 12 to 14 times current international flows. The report also found that a goal of doubling international public adaptation finance by 2025 was likely to have been missed.
This year’s edition will be closely watched with adaptation expected to be a big-ticket item at COP31. Governments are likely to discuss the specifics of a commitment to triple adaptation finance for developing nations by 2035, agreed at COP30 last year – particularly what the baseline for that pledge is. Negotiators will be debating how to track progress against the 59 indicators of the Global Goal on Adaptation.
Read more: Editor’s Desk: Nepal’s disaster has laid bare the world’s adaptation accountability gap
Read more: Bonn climate talks end in “gridlock” on adaptation and emissions-cutting
Read more: New data shows rich nations likely missed 2025 goal to double adaptation finance
COP31 Climate Conference
Monday 9 November – Friday 20 November – Antalya, Türkiye
The climate community’s attention turns this month to Antalya for the annual UN climate summit. From the outset, COP31 will have an unprecedented, and potentially explosive, set-up: Türkiye is COP president overseeing the non-negotiated Action Agenda, while Australia runs the negotiations.
Billed, once again, as an “implementation COP”, the talks come amid a global energy crisis largely sparked by the actions of the US government, which is not expected to show up on the Turkish Riviera. It is also the first COP in the era of climate overshoot, coming just weeks after the UN officially confirmed the 1.5C warming limit will be breached and set out a narrow pathway to bring temperatures back down to the most ambitious Paris goal.
Unlike most recent COPs, the formal negotiations lack a clear headline item. Countries are due to establish and define the scope of the Just Transition Mechanism agreed in Belém last year, including its rules, governance and possible funding arrangements. On adaptation, vulnerable countries want a clearer path to delivering last year’s pledge to triple finance by 2035 and to putting the new progress indicators to work on the ground.
Governments are also likely to clash over next steps on the transition away from fossil fuels, and especially over whether the mitigation work programme – the forum dedicated to emission-cutting measures – has any future beyond this year.
Notable events to look out for in Antalya:
Opening session (9 November): The summit kicks off with the customary first-morning plenary. After the usual pageantry from the host nation, negotiating blocs and individual countries will deliver statements setting out their stall for the next two weeks. Watch out for a potential fight over the summit’s agenda – perhaps on issues relating to finance and trade following submissions requesting additional items – also a COP tradition.
Electrification (10 November): On Energy Day, the Turkish presidency is expected to formally launch its flagship electrification pledge, revealing which countries have signed up. Signatories will voluntarily commit to raising electricity’s share of global final energy consumption to 35% by 2035, though the current text does not require that power to come from clean sources. There is also a question mark over whether and how this can be included in the political cover decision the COP co-hosts have said they will aim to produce.
Leaders Summit (11-12 November): Heads of state and governments will jet into town for the traditional high-level segment in the middle of the first week, where world leaders typically talk up their climate record, air their grievances and call for more action.
Relatively few powerful leaders are on the list this time. Brazil’s Lula is set for another star turn this year, fresh from his surprise election win in October. The UK’s Andy Burnham, Spain’s Pedro Sanchez and China’s vice-premier Ding Xuexiang are expected, alongside Türkiye’s Recep Tayyip Erdogan and Australia’s Anthony Albanese. In addition, African and small island nations will feature prominently.
Our COP31 Briefing newsletter will offer a more in-depth preview of the talks later this week.
Read more: Early speakers’ list suggests few powerful leaders will attend COP31
Read more: COP31 electrification pledge leaves out clean power commitment
Read more: From Belém to Antalya – gains, gaps and challenges for a new Just Transition Mechanism
International Maritime Organization (IMO) Shipping Talks
Monday 23 November – Friday 4 December – London, United Kingdom
One year on from explosive talks in which Trump’s officials teamed up with Saudi Arabia to delay a deal to make the shipping industry greener, governments will gather on the banks of the Thames for another attempt to reach agreement.
The Net Zero Framework, provisionally agreed in October 2025, includes a series of emissions reduction targets for the owners of large ships along with penalties for not meeting them, rewards for doing so and measures to make the maritime transition fair.
The framework is likely to be either tweaked or radically rewritten so that it’s more acceptable to the US and Saudis. Brazil and Japan have submitted compromise proposals. Analysts find those will move shipping further away from being able to meet its climate goals.
There will be closed-door talks between November 23-27 and a second week of talks open to accredited media from November 30 to December 4. Agreement on a proposal, perhaps decided through a vote, is expected after long and technical negotiations. The shipping industry’s 3% share of the world’s emissions is at stake.
Read more: London talks raise hopes for green shipping deal
The post What’s on the climate calendar for November 2026? appeared first on Climate Home News.