【单选题】'Geothermal Energy' → Geothermal energy is natural heat from the interior of the Earth that is converted to heat buildings and generate electricity. The idea of harnessing Earths internal heat is not ...
A.
explaining the history of this energy source worldwide
B.
arguing that this energy source has been tried unsuccessfully
C.
comparing the production with that of other energy sources
D.
describing the alternatives for generating electric power