Q. Which of the following energy sources will come under the definition of 'conventional energy sources'?
  1. Coal
  2. Cow dung
  3. Tidal energy
Select the correct answer from the codes given below:

Answer: Only 1 and 2
Notes: Tidal energy is an example of unconventional energy sources. Both commercial and non-commercial sources of energy are known as conventional sources of energy. There are three other sources of energy which are commonly termed as non-conventional sources - Being a tropical country, India has almost unlimited potential for producing all three types of energy if some appropriate cost effective technologies that are already available are used.