The major contributor to greenhouse gases was the ruminating process During a cow's digestion process, as food enters the stomach, it mixes with bacteria, which breaks the food down and produces methane (a greenhouse gas) Roughly minutes later, the food returns to the cow's mouth as cud, which it chews, thereby releasing methane into the airAlthough greenhouse gases make up only about 1 percent of the Earth's atmosphere, they regulate our climate by trapping heat and holding it in a kind of warmair blanket that surrounds the planetComparing greenhouse gases In order to calculate the contribution of the different gases to the greenhouse effect, three fundamental parameters must be taken into consideration concentration in the atmosphere;
5 Notorious Greenhouse Gases Britannica
