Methane is a greenhouse gas that has 23 times adverse effects on climate than carbon dioxide. Methane is that greenhouse gas which is produced by the raising of cattle. On an average a cow can produce 80 - 120 kgs of methane in an year.
The term market in economics refers to the place or arrangement where the buyers and sellers come to contact directly or indirectly for buying and selling goods. Market refers to not a specific or particular place it is the place for commodities..