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 | A renewable resource is a resource that never runs out. Renewable energy is energy that comes from a source that is available to be used over and over again.
When we use renewable energy we reduce greenhouse gas emissions and other environmental pollution. Therefore, renewable energy has become very important and relevant to today’s world.
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 | Day after day, the sun shines, the wind blows, and the rivers flow. We use renewable energy sources mainly to make electricity. | |  | There is tremendous energy in the ocean waves. It's estimated that the total potential off the coast of the United States is 252 billion kilowatt hours a year. Tidal turbines are basically wind turbines in the water that can be located anywhere there is strong tidal flow. The entire west coast of California touches the Pacific Ocean- where waves never stop! |  | The entire world resource base of geothermal energy has been calculated in government surveys to be larger than the resource bases of coal, oil, gas and uranium combined. | | 
| One wind turbine can produce enough electricity to power up to 300 homes. |
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