I could site 20 documentaries and 50 articles, but I will keep this simple. Feed to meat least to most. = Chicken, Pork, Goat/mutton, Beef. Water consumption in liters per kg meat=Goat-1,000, Chicken 4,000, Pork 5,000, Beef 15,000.
Ending government subsidized beef globally and switching to beans, chicken, and pork alone would put us near global emissions goals for 2020 and keep a lot of chemicals out of the water system.
"... Almost a third of the land on Earth is used to produce meat and animal products.
This means much less deforestation and land degradation if so many plant crops weren’t run through the digestive tracts of cattle. If Americans traded their beef for beans, the researchers found, that would free up 42 percent of U.S. crop land."
Eating meat is not immoral. I've been eating it my whole life. Eating meat is a part of everyday life. I view eating meat as necessary to my health and well being. Meat provides benefits, such as proteins and nutrients, that other foods do not. People have eaten meat throughout history.
Humans are naturally inclined to eat meat and plants, so it isn't some horrible crime to continue doing it. As long as we regulate the industry so that the animals are raised and killed humanely, then there shouldn't be a problem. In the end, it is a matter of choice whether or not you will eat meat.