Factory farming supporters are denying these claims. Sen. Chuck Grassley (R-Iowa), who's well known for declaring he would "eat more meat on Mondays" in response to the Meatless Monday movement, told Fox News that "generations of cattle farmers and ranchers have been and continue to be conscientious about conserving limited natural resources."
However, recent studies have shown that factory farming, and beef farming, in particular, is a surprisingly significant contributor to greenhouse gas emissions and uses a disproportionate amount of natural resources.
One 2014 study showed that livestock farming was responsible for a shocking one-fifth of the world's greenhouse gas emissions.
Beef production was particularly draining on natural resources, requiring 160 times more land and eight times more water than the production of staple plant foods. It also produced 11 times the greenhouse gas emissions.