The GHG footprint of cow"s cheese is similar to that of goat"s or sheep"s milk cheeses "because they"re all ruminants," says Bridle. "But cow"s cheese is probably the most efficient because dairy cows produce vast amounts of milk." According to data from the UK"s Department for Environment, Food and Rural Affairs, a dairy cow produced an average of 8,200 litres (1,800 gallons) last year.