Energy Resources which are being used for many decades are known as _
A. conventional energy sources
B. non-conventional energy sources
C. primary energy sources
D. fuel cells
Answer:A
Energy Resources which are being used for many decades are known as _
A. conventional energy sources B. non-conventional energy sources C. primary energy sources D. fuel cells
Explanation: Conventional sources of energy are those sources that are being used traditionally for a long time i.e. coal, petroleum, firewood, etc. Non-conventional sources are relatively new in terms of utilization.