There’s an extra benefit to the environment when we go veg that’s not often talked about. We’ve written in the past about how much global warming gases are emitted by the animal agriculture, but there’s more good news. Once we stop raising animals for meat, the land they were using, directly and indirectly, could be allowed to return to its natural state and start absorbing carbon.
The extensive amount of land used to raise meat incurs a carbon opportunity cost, given the potential for carbon sequestration through ecosystem restoration. Soil carbon sequestration is a process in which CO2 is removed from the atmosphere and stored in the soil carbon pool. As the ecosystem recovers, the native plants absorb carbon dioxide through photosynthesis, and store carbon in their roots, thus increasing organic carbon in the soil.
This would have a huge impact. Raising meat has had a particularly detrimental impact on land since half the land on earth is used directly or indirectly for raising meat. A recent study showed that if everyone in the world went vegan, we could remove 16 years of fossil-fuel-based carbon emissions from the atmosphere by the year 2050. That’s enough to really turn around the levels of greenhouse gases in the atmosphere and start to reduce the rate at which the climate is changing.
Another factor not talked about is that the mass of animals raised for slaughter on Earth now outweighs all wildlife by a factor of 15-to-1. This causes massive damage to world’s ecology and leads to a reduction in biodiversity with the extinction of many species. With the land freed up from raising animals, wildlife would have a chance to recover increasing the chances of species survival. This would provide a broad benefit to the ecology and help normalize the natural food chain, making the soil and plant life healthier, which could then absorb further carbon from the atmosphere.
So a global switch to a vegan diet would both reduce the emission and increase the absorption of greenhouse gases, and enable the ecology and especially the soil to recover, creating a virtuous circle instead of a vicious decline in the health of our planet.