Answer: Nuclear fusion
Step-by-step explanation:
Green power can be define as the generation of thermal and electrical energy by utilizing the renewable sources. This form of power produce minimum or low pollution hence, cause no or less harm to the environment.
Nuclear fusion is the process that occurs in the thermal power plant in which atoms with high atomic mass are fused to liberate thermal energy and nuclear radiations. The radiations are harmful and mutagenic. These radiations and thermal energy includes greenhouse gases which are likely to pollute the air.
On the basis of the above explanation, nuclear fusion is the correct option.