Definition of non-conventional energy sources.

Basically making energy out of thing like: Wind, Solar Panels, ect. 

The energy which can be regenerated is known as non conventional resource eg tidal power and nuclear energy

The purpose of a lab is to do your "expirements" the importance of the topic is so you can now what the story is about and the last one is because no one is me with my question ( what is 3 over 4 x - 9 = 27 maybe you can )