Star sessions nina8/5/2023 ![]() The water contained in this artificial reservoir is spun on turbines to produce electricity. Hydroelectric power plants are established on dams which control the water flow, creating a reservoir. Hydroelectric power uses the movement of water current from higher to lower elevations to produce electricity. The world's technical potential for wind energy exceeds global electricity production. Turbines located on land (onshore) or sea or freshwater (offshore) are used to harness the energy from moving wind. In 200 BCE, people used windmills to grind grain in the Middle East and pump water in China. 5,000 years ago, ancient Egyptians made boats powered by the wind. Wind energy has been used since ancient times to power activities in civilisation. Solar panels convert sunlight into electricity and these panels last for a good 30 years. Research and scale have plummeted the cost of solar energy, making it the cheapest form of electricity. The amount of solar energy that reaches the earth's surface in one hour is more than the planet's total energy requirements for a whole year. The rate at which solar energy is intercepted by the Earth is about 10,000 times greater than the rate at which humankind consumes energy. The sun provides the world with sustenance. The sun is the ultimate source of energy for all our energy sources and fuel. Solar energy is the most well-known source of renewable energy.
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