The Sun is our greatest source of energy. Without its light and heat, life on Earth would not exist. For centuries, people have used the Sun's energy to heat their homes and cook meals. Today, we use
A waving flag, blowing leaves, a kite soaring through the sky-all are moved by wind power. Wind is also our fast-growing source of energy. Find out how wind forms and the different ways we may use it
If you’ve ever seen a crashing ocean wave or a rushing waterfall, you’ve seen water power in action. People have used flowing water to do work for centuries. Today, water power is a dependable resourc
Our lives would be very different without oil, gas, and coal. These fossil fuels help heat our homes, turn on our lights, and power our cars and trucks. But they also damage our environment—and they w
