Renewable and Nonrenewable Energy Sources All the fossil fuels(coal, oil, natural gas, shale oil, tar sands, etc. ) Uranium-235 nuclear fission fuel, deuterium nuclear fusion fuel, and some other types of geothermal energy The time to exhaust a nonrenewable resource depends on the rate of use and size of the resource It is likely that most forms of nonrenewable energy will get more expensive when they are near exhaustion We have only three sources of renewable energy: Solar, geothermal, and tidal All energy sources based on the solar energy incident on earth-direct sunlight wind, hydroelectric power, ocean currents, ocean thermal gradients, and biomass are renewable The energy in the oceans tides has its origin in the gravitational interaction between the earth and the moon and to a lesser extent between the earth and the sun The more renewable energy we use, the cheaper it will be 复旦大学环境科学与工程系 Department of Environmental Science and Engineering, Fudan UniversityRenewable and Nonrenewable Energy Sources All the fossil fuels(coal, oil, natural gas, shale oil, tar sands, etc.), Uranium-235 nuclear fission fuel, deuterium nuclear fusion fuel, and some other types of geothermal energy. The time to exhaust a nonrenewable resource depends on the rate of use and size of the resource. It is likely that most forms of nonrenewable energy will get more expensive when they are near exhaustion. We have only three sources of renewable energy: Solar, geothermal, and tidal. All energy sources based on the solar energy incident on earth – direct sunlight, wind, hydroelectric power, ocean currents, ocean thermal gradients, and biomass, are renewable. The energy in the oceans’ tides has its origin in the gravitational interaction between the earth and the moon, and to a lesser extent, between the earth and the sun. The more renewable energy we use, the cheaper it will be