Recent energy scarcity has led to the fact that total dependency on energy generated from fossil fuels may not turned out to be an effective policy for a longer run. Methane production using the waste from animals has become an economically viable process for animal production procedures on intermediate to large scale. Expansion and development of the livestock industry has not yet introduced options for proper dumping of the waste generated in surplus quantity at poultry, dairy farms, and swine. Pollutants generated out of irregular livestock waste destroys the environment and contribute to global environment change. Interest in conversion of this waste into useful gas mainly methane has aroused. In this paper we will discuss few currently present opportunities for producing methane gas from the waste of animal and its contribution for the betterment of environmental quality and sustainability.