Which is the biggest source of non-conventional energy?

Which among the following is not a conventional energy source?

Which among the following is not a bio fuel plant?

Which resources are reproduces without getting depleted?

Which type of soil is found in Coimbatore?

Which one of the following is a producer of lignite?

Which districts hold the largest share of forest?

In which district Mettur Thermal Power station is situated?

Which is the first atomic power station of Tamil Nadu?

Which among the following are obtained from biosphere?