Following are renewable energy sources:

1. Sunlight
2. Tides
3. Wind power
4. Geothermal energy
5. Biomass & Biofuel

6. Hydropower

    

Importance of using renewable energy:

1. They are generally clean sources of energy and have much lower impact on environment.
2. Being clean sources, they do not produce toxic substances. Thus protecting us from potential health hazards.
3. Conventional non-renewable sources of energy like petroleum, gas, coal etc. are finite likely to run out in not so distant future.
4. Although producing energy in usable form is costly now, it will be eventually much cheaper as the only cost involved is setup and maintenance and not for the actual materials from which energy is harnessed.
5. Important foreign currencies are generally used for importing oil & gas which is not good for developing economies like India.
6. Dependency on other nation for energy is reduced due to usage of renewable sources, which proves to be a boon in times of international emergencies.