For a while now, scientists have been professing a switch to a vegetarian diet to counter the impacts of climate change. On March 26, 2016, there was an article on TIME magazine as well, about this. According to that article, livestock contributes more than 14% of greenhouse emission, and this figure could grow to 50% by 2050, with growing population and the need for more food.
Human beings, like every other living organism, has a relationship with its surrounding environment. This relationship began the moment our species evolved and has been a dynamic relationship ever since. We have interacted with the environment in several ways spread over centuries, and it is important to understand this relationship before we understand the situation today (isn’t that why we study history anyway?).