Question

Why are many thermal power plants set up near coal or oil fields

Answer 1

This is so because the transmission of electricity is more efficient than transporting coal or oil over the same distance. 
Hydro Power Plants
Hydro power plants convert the potential energy of falling water into electricity. 
Hydroelectricity: - Electricity generated by using kinetic energy of flowing water is called hydroelectricity.

Answer 2

Answer: Heya....

Explanation: Coal or petroleum is required to heat water to produce steam for running the turbines in thermal power plant...

Cost of transportation is reduced if thermal plants are set up near coal or oil fields.......