Every time you drive your car, you are slowly, but surely killing our planet and ruining the next generation’s lives by using fossil fuels instead of clean energy. (You monster!).Clean energy includes solar, geothermal, wind and hydroelectric. Clean energy is an alternative energy source to fossil fuels. Fossil fuels include oil, coal and gasoline. When fossil fuels are burned, they release carbon dioxide and that causes the “greenhouse effect.”  The “greenhouse effect,” more commonly known as “global warming,” occurs because carbon dioxide traps the sun's energy and increases the world’s average temperature.We should use only clean energy sources because fossil fuels are almost gone, fossil fuels are polluting the air, causing animals to get hurt, and clean energy is pollution free.