Tigers are the mammals of the Felidae family and one of the four ‘big cats’ in the Panthera genus. They have the species name Panthera tigris. They are predatory carnivores and the largest and most powerful of all living cats.
Nepal is blessed with abundant wetlands. Out of them 10 have been enlisted in the Ramsar sites. Despite of their worldwide recognition and publicity the lakes over here are facing many problems. Among them invasion by water hyacinth is severely intense.
Coal is a combustible black or brown sedimentary rock composed mostly of carbon and hydrocarbons. It is a fossil fuel and is altered remains of prehistoric vegetation that originally accumulated in swamps and pet logs. It is a non renewable form of energy absorbed by plants from the sun millions of years ago.