Food Emissions: What You Eat Matters More Than Where It’s From

Food production is one of the most significant contributors to global greenhouse gas emissions, responsible for around 25% of the world’s total. This highlights the importance of how dietary choices impact our carbon footprint. While recommendations like “eat local” are common, they may not be as effective as they seem.

The graph above clearly illustrates the substantial environmental impact of animal-based food production. Beef, in particular, stands out as a major contributor to greenhouse gas emissions, with a total of 99 kg of CO2e per kilogram produced. This includes emissions from land-use change, animal feed, processing, transport, retail, and packaging. Lamb and mutton also have a considerable carbon footprint, emitting 40 kg of CO2e per kilogram.

In contrast, plant-based alternatives like tofu, soy milk, and beans generally have a lower environmental impact, with tofu emitting only 3.2 kg of CO2e per kilogram.

If the world is to meet its target of limiting global warming to “well below” 2C, some degree of diet shift will be necessary, scientists say. If it is to strive for the most optimistic target of keeping warming to 1.5C, changes to diet may be even more crucial.

The Real Impact: What You Eat Matters More

Though it might seem logical that eating locally reduces emissions by cutting down on transportation, research shows that the emissions from food transport are surprisingly low. For most foods, transport accounts for less than 10% of their carbon footprint. The bulk of emissions come from land use and farming practices. For high-emission foods like beef, transportation contributes less than 1% to its overall emissions.

The takeaway: Focusing on what you eat is a much more effective way to reduce your carbon footprint than worrying about how far your food has traveled. By understanding the environmental cost of food production, individuals and corporations can make informed choices that lead to meaningful reductions in emissions.

Why Beef and Animal Agriculture Are Major Polluters

Beef and animal agriculture, particularly the cattle industry, are significant contributors to environmental pollution, largely due to their high carbon footprint. Beef production is notorious for its emissions, which are much higher compared to other types of food. A few key reasons explain why:

1. Land Use and Deforestation:

Raising cattle demands vast amounts of land, both for grazing and for growing feed like soy and corn. Often, this land is cleared from forests, especially in regions like the Amazon rainforest, contributing to deforestation. When trees are cut down, they can no longer act as carbon sinks, which worsens climate change. In fact, 70% of deforestation in the Amazon is linked to livestock farming. This land use change leads to massive amounts of carbon being released into the atmosphere.

2. Methane Emissions:

Cows naturally produce methane during digestion through a process called enteric fermentation. Methane is a greenhouse gas that’s over 25 times more potent at trapping heat in the atmosphere than carbon dioxide. A single cow can produce between 70 to 120 kilograms of methane each year, making cattle farming a significant source of methane emissions globally. Since methane has a more immediate effect on global warming, these emissions are particularly problematic in the short term.

3. Resource-Intensive Nature:

Compared to plant-based foods, raising cattle is highly resource-intensive. Producing beef requires massive amounts of water, with estimates ranging from 10,000 to 20,000 liters of water needed per kilogram of beef. This includes water for growing feed, drinking water for the animals, and water used in processing. Additionally, the amount of energy needed for animal-based agriculture, from feed production to transportation, is much higher than for plant-based foods, leading to greater fossil fuel consumption.

The Power of Switching to Chicken and Plant-Based Meals

Switching from beef to chicken can significantly reduce your carbon footprint, as chicken produces about 10 times fewer emissions than beef. Beef has one of the highest environmental impacts due to several factors as mentioned above. In contrast, poultry farming is far less resource-intensive.

Here’s why chicken is a more sustainable option:

1. Lower Land Use: Raising chickens requires less land compared to cattle, helping to reduce deforestation and habitat destruction.
2. Reduced Methane Emissions: Chickens don’t produce methane in the same way that cows do, making their overall greenhouse gas emissions significantly lower.
3. Efficient Feed Conversion: Chickens are more efficient at converting feed into protein. This means they require less grain, water, and energy compared to cattle, further reducing their environmental impact.

Plant-Based Diet

Compared to meat and dairy, plant-based foods generally have a significantly smaller carbon footprint. On average, emissions from plant-based foods are 10 to 50 times lower than those from animal products.

However, there are some notable exceptions, such as coffee and chocolate, which have relatively higher carbon footprints as seen in the graph above. Coffee, largely grown in tropical regions, tends to have a higher climate impact due to the extensive use of nitrogen fertilizers in its production. Similarly, chocolate’s environmental toll stems primarily from the land-use changes required to cultivate cocoa, often involving deforestation in tropical areas.

It’s important to put these figures in perspective. Coffee and chocolate don’t contribute significantly to human nutrition, and their typical serving sizes are much smaller than most other food items. While both have a relatively high impact, the overall contribution to emissions is less significant when considering the smaller portions consumed compared to other foods.

In short, while coffee and chocolate do have higher footprints than most plant-based foods, their overall impact is moderated by their serving size and limited nutritional role.

The Impact of Just One Day

Switching from beef or lamb to poultry, or even better, plant-based meals for just one day each week can result in significant carbon savings:

• Replacing Beef with Chicken: Simply swapping beef with chicken one day a week can reduce your food-related emissions more than eating entirely local. The difference in carbon output between the two is so vast that a small shift in diet has a more substantial environmental benefit than reducing food transport.
• Cutting Red Meat and Dairy: By going red meat and dairy-free for just one day each week, you can save the equivalent amount of emissions as you would by eliminating all food transport entirely. This highlights how animal products, particularly beef and dairy, are the main drivers of food-related emissions, not the miles your food has traveled.

Can Switching to Vegetarian, Vegan, or Other Diets Reduce Emissions?

One of the most powerful ways individuals can help fight climate change is by rethinking their food choices. While discussions around sustainability often focus on transportation and energy use, food production—particularly animal agriculture—plays an enormous role in greenhouse gas emissions. According to various studies, the climate impact of plant-based foods is consistently 10 to 50 times smaller than that of animal products. This stark contrast highlights the immense potential of switching to diets that focus on plant-based alternatives, such as vegetarian, vegan, or flexitarian diets.

The Environmental Impact of Diets: A Comparison

A comprehensive analysis by the Intergovernmental Panel on Climate Change (IPCC) explores how different diets, from vegan to climate-conscious carnivores, could help curb emissions. The findings suggest that the global adoption of plant-based diets could result in massive reductions in greenhouse gases, potentially far outstripping the benefits of other popular environmental efforts like eating locally sourced food.

The IPCC report categorizes a variety of diets, each with different impacts on the planet:

According to the report, the more plant-based the diet, the greater the emissions reductions. In particular, a global shift to veganism could deliver the most substantial climate benefits, potentially saving up to 8 billion tonnes of CO2-equivalents (CO2e) per year by 2050. To put that into perspective, food production currently generates around 13.7 billion tonnes of CO2e annually—meaning a significant portion of global food-related emissions could be eliminated.

Beware of Air-Freighted Foods

While food transportation doesn’t typically make a big impact on carbon emissions, there’s one exception: air-freighted foods. These are usually perishable goods that need to be consumed quickly after harvest, such as asparagus, green beans, and certain berries. Air travel emits 50 times more CO2 per kilometer than sea transport, making air-freighted foods a significant contributor to emissions. To reduce your carbon footprint, avoid foods that are likely to be air-freighted—especially those with short shelf lives that travel long distances.

Food Emissions in the UAE

In the UAE, food-related emissions are an important issue due to the country’s heavy reliance on imported food. The UAE imports about 90% of its food, which means food miles—emissions from transporting food across vast distances—contribute to the country’s carbon footprint. While transport emissions from food are typically low (often less than 10% of the total footprint), they still add up, especially in a country like the UAE where food must be shipped long distances.

In addition to transportation emissions, food waste is a critical issue in the UAE. During peak periods like Ramadan, food waste spikes by 25%, adding to the overall carbon footprint. Disposing of unused food means that all the resources spent growing, transporting, and preparing it are essentially wasted, contributing further to emissions. Each year, around 38% of food prepared in the UAE is discarded, which adds significant pressure to the environment.

Despite these challenges, the UAE has been taking steps to address its food emissions. Some key initiatives include:

Key Actionable Steps to Reduce Food Emissions

There are several ways individuals can actively reduce food-related emissions:

• Reducing Meat and Dairy: Shifting to a plant-based diet or cutting back on meat by even a few meals a week can make a significant impact.
• Prioritizing Low-Impact Foods: Legumes, grains, fruits, and vegetables have much lower emissions than animal products.
• Cutting Back on Beef and Lamb: These two meats have the highest carbon footprints, so any reduction can be impactful.
• Planning Meals to Reduce Waste: Avoid food waste by planning meals and storing food properly.
• Supporting Sustainable Brands: Choose brands that are transparent about their sustainability practices.
• Reducing Processed Foods: Processed foods often require more energy and resources to produce.
• Composting: Composting food scraps prevents them from ending up in landfills, where they would generate methane.

What Can Corporations Do?

Corporations, especially in the UAE, have a key role to play in minimizing food-related emissions:

• Set Sustainability Goals: Establish benchmarks for sustainable food sourcing, packaging, and waste management.
• Offer Sustainable Food Choices: Promote plant-based options and source sustainable, low-emission food.
• Partner with Sustainable Suppliers: Work with suppliers that prioritize eco-friendly practices and local sourcing.
• Reduce Food Waste: Implement waste-tracking systems and donate surplus food to local charities.

Small Changes, Big Results

While a complete global shift to veganism may seem ambitious, even smaller changes—such as reducing red meat consumption—can have significant environmental benefits. For example, flexitarian diets, which cut meat and dairy by 75%, still have the potential to make a substantial impact. Similarly, replacing just a few meals per week with plant-based options can lead to measurable reductions in emissions over time.

Crucially, these changes aren’t just about reducing carbon footprints. Reducing meat and dairy consumption also alleviates pressure on global water supplies, reduces land degradation, and decreases biodiversity loss caused by agricultural expansion.