(1) Is thermal energy AVAILABLE?

(2) is it technologically FEASIBLE (or possible) to use thermal energy?

(3) How much does it COST? Is the energy cheap?

(4) Is the energy SAFE?

(5) How DEPENDABLE is thermal energy? Does it depend on the weather or other varying conditions?

(6) Is thermal energy SUSTAINABLE? Will it be around in 100 years?

(7) Is thermal energy CLEAN? Are there any toxic or dangerous waste products