a.) Building a dam changes the natural flow of a river, which destroys plant and animal habitats.
Also referred to as hydroelectricity, this type of energy is produced by turning falling water into electricity. The propulsion of water is used to produce electricity.
Neither the air nor the water is contaminated by hydropower. However, hydropower plants have the potential to significantly alter the environment, as well as homes, land usage, and natural habitats near the dam.
Considering that it doesn't involve burning unclean fossil fuels, hydroelectricity is regarded as a clean source of energy in many nations. But that is not at all accurate. According to a recent study, the world's hydroelectric dams are responsible for as much methane emissions as Canada. Hydropower is a significant source of greenhouse gas emissions.
Learn more about hydropower here:
brainly.com/question/22258411
#SPJ4