Energy is a critical foundation for economic growth and social progress. Higher is the economic growth, higher is the requirement of energy, depleting fossil fuels and its pollution on the environment has given rise to the ever-serious contradiction among energy providing, environment protection and economic development. Renewable energy, with the availability of its renewability and non-pollution, will prove to be an effective and practical choice to guarantee the future development of the world. Utilization of fuels has to be done in sustained way so that upcoming generation can get benefit of natural resources. Enhancement & proactive use of CDM (Clean Development Mechanism) projects is another optimistic way towards sustainable development.