According to Hollywood Patch:
Most cat or dog lovers would say they can’t imagine living in a world without pets, but as the threat of global warming increases, environmentally conscious pet lovers may need to make some tough choices, according to the study.
Pet ownership in the United States creates about 64 million tons of carbon dioxide a year, UCLA researchers found. That’s the equivalent of driving 13.6 million cars for a year. The problem lies with the meat-filled diets of kitties and pooches, according to the study by UCLA geography professor Gregory Okin.