Biologists have proposed kangaroos to "help" cows cope with their contribution to global warming.

They found that the feces of baby kangaroos could be useful in combating global warming: the bacteria contained in them reduced the production of methane in an artificial cow's stomach, which could potentially work on live cows. If successful, farmers will receive an inexpensive feed supplement that will reduce their farms' methane emissions. Sheep, cows and goats release huge amounts of dangerous greenhouse gas during digestion. It is about 30 times better than carbon dioxide at retaining heat in the atmosphere.