Choose the word that best fits the blank space in the following passage

Wind power is an (1)______ option for collection alternative electric power. Wind power works by (2)______ the energy from the wind with a rotor that turns and powers a generator. The (3)______ is then stored or used to power machinery, lighting, and even homes. Wind power is (4)______ even if you don't have much land, but is not (5)______ for city areas where nearby buildings will block most of the wind.

Wind power is an (1)______ option for collection alternative electric power.