In addition, creatures like salmon that depend on free rivers get stuck at the dam and cannot spawn or perform other necessary functions. Hydroelectric energy also contributes to deforestation and erosion. The suns rays can be transformed into electricity and heating in several ways. PVs use cells that absorb light and convert it into electricity by emitting electrons. The angle and location of the sun at all times of the year is calculated and a house is built to maximize heat gain in winter and heat loss, or evasion in summer.
Solar energy is considered one of the cleanest and safest sources of energy.
We can get energy from the wind by setting up turbines that look like large fans. When the wind blows through them, it causes their blades to spin. The spinning turbines drive electricity generators. Individual homeowners can use small turbines for smaller energy needs, but greater energy requires larger and more numerous turbines. Though wind turbines have a tendency to kill some birds of prey, scientists are working on technology to minimize bird life loss.