president GEorGE w. Bush, in a June 2005 speech delivered to a group of nuclear power plant workers intoned, "The 103 nuclear power plants in America produce twenty percent of the nation's electricity without producing a single pound of air pollution or greenhouse gases." Experts in the nuclear energy field, both for and against nuclear energy, find this statement lacking credibility. Nuclear energy critics cite the significant amount of greenhouse gases produced by the nuclear fuel cycle in aggregate. Not surprisingly, proponents of nuclear power generation focus on the reactors themselves, which produce nothing but water vapor from the cooling towers.
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Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable. The usage of renewable energy sources is very important when considering the sustainability of the existing energy usage of the world. While there is currently an abundance of non-renewable energy sources, such as nuclear fuels, these energy sources are depleting. In addition to being a non-renewable supply, the non-renewable energy sources release emissions into the air, which has an adverse effect on the environment.