Veganism could save the planet. Here's why.

In 2006, the United Nations stated:

“The livestock sector emerges as one of the top two or three most significant contributors to the most serious environmental problems, at every scale from local to global. The findings of this report suggest that it should be a major policy focus when dealing with problems of land degradation, climate change and air pollution, water shortage and water pollution, and loss of biodiversity.”

And then four years later, they warned that a global shift towards a vegan diet is vital to save the world from hunger, fuel poverty and the worst impacts of climate change.

So why exactly is animal farming bad for the environment?