Food and Climate: Is Eating Vegan More Ecological?
When we talk about climate change, we often think of transport or energy. Yet, the link between food and climate is just as important. What we eat every day has a direct impact on the planet.
In France, food accounts for approximately 22% of households' carbon footprint. In other words, what we eat weighs almost as much as housing (22%) or travel (31%).
So, do you really have to eat vegan to reduce your carbon footprint? To answer this question, we need to make a concrete comparison of what is on our plates.
1) Food and climate: plant-based vs. animal-based meals
A difference that is quickly apparent
In the debate about food and climate, the difference between a plant-based meal and a meal with meat is far from insignificant.
For example:
→ 1 kg of beef can emit up to 20 to 30 kg of CO2.
→ 1 kg of lentils or grains is often less than 2 kg of CO2.
We are therefore talking about an impact 10 to 15 times higher for certain animal products.
Why it is more impactful
It is quite simple to understand: to produce meat, you must first feed the animals. And for that, we grow plants… which could have been consumed directly.
→ more crops
→ more energy
→ more transport
This is what we call an efficiency loss: we use a lot of resources to produce relatively few calories.
2) Food and climate: what carbon footprint?
Food, a significant weight in our emissions
Food accounts for about 2 tonnes of CO2 per person per year in France.
And more than half of these emissions come directly from agriculture, particularly from livestock farming.
The role of methane
A large part of these emissions is linked to methane:
→ 31% of food emissions come from methane.
→ Mainly due to ruminants (cows, sheep, etc.)
Methane is a much more powerful gas than CO2 in the short term.
Reducing meat, a concrete lever
The data are clear:
→ replacing some animal products with plant-based ones makes it possible to significantly reduce the carbon footprint.
→ even without going vegan, reducing or eliminating meat has an immediate impact.
It is one of the most effective changes on an individual scale.
3) Food and climate: what water consumption?
Huge disparities depending on the food
We think about it less, but the link between food and climate also involves water. And here again, the disparities are impressive.
Producing meat requires enormous amounts of water, far more than most plant-based foods.
→ 1 kg of beef requires an average of 15,000 liters of water
→ some livestock systems go up to more than 30,000 liters/kg
For comparison:
→ 1 kg of tomatoes = 200 liters of water
→ grains and vegetables are generally well below 1,000 liters/kg
Concretely, producing beef can require 10 to 50 times more water than plant-based foods.
Where does all this water go?
Water isn't just used to water the animals!
For 1 kg of beef:
→ about 15,300 liters are used to produce their feed (grains, soy, etc.)
→ only about 150 liters are linked to the water the animal drinks directly
In other words: more than 99% of the water is indirect.
4) Food and climate: what use of agricultural land?
Livestock occupies a lot of space
Another important point in the relationship between food and climate: land use.
A large part of agricultural land is used today for livestock, either directly or to produce animal feed.
In France, the consumption of meat and dairy products takes up more than 80% of agricultural land. Yet, these products only represent a fraction of our calorie intake!
Plant-based, more efficient
Conversely, crops intended directly for human consumption are much more efficient. They make it possible to produce more food with less surface area.
Less land used also means less deforestation, less pressure on ecosystems, and more space for biodiversity.
5) Food and climate: should you eat vegan?
What the numbers say
If we look at all the data on food and climate, one thing stands out clearly: eating vegan is generally more ecological.
→ Food = 22% of the carbon footprint
→ Livestock = a large part of agricultural emissions
→ Animal products = impact often far superior to plant-based
Every change counts
Reducing meat consumption, especially red meat, already has a significant impact. And making more room for plant-based foods on your plate is a good first step! 😉
Towards a more balanced diet
Ultimately, the question of food and climate does not boil down to a label.
The idea is to move gradually towards a diet that is:
- more plant-based
- less processed
- and if possible, more local
Key takeaways
The link between food and climate is now well established. Our food choices have a real weight on the environment.
Without being a miracle solution, eating more vegan is among the most effective changes we can make on our own scale.
Every small step counts! 😉
