The dairy industry has a substantial impact on the environment. Farmers tend to about 270 million cows in order to produce milk. Having this large scale production has an enormous environmental impact. Large amounts of water are used to sustain the dairy industry with raising cattle, growing food, and processing milk. It takes between 30 to 50 gallons of water to sustain each cow per day. Raising dairy cattle also requires large amounts of land. Cattle create large amounts of greenhouse gas emissions that increase the effects of global warming.