WHAT ARE SUSTAINABLE ENERGY SOURCES

I he fossil fuels currently available to us are limited. At present rates of con-X sumption, known recoverable oil and gas reserves will disappear by the end of the century and coal reserves several centuries after that. Furthermore, burning fossil fuels adds undesirable amounts of greenhouse gases to the atmosphere. Nuclear fission reactors do not emit greenhouse gases, but they generate massive quantities of radioactive wastes. Nuclear fusion reactors offer many potential benefits, but it may take many decades before they are both technologically and economically feasible. So what do we do  

Was this your answer A sustainable energy source is an energy source that has the potential for being available indefinitely The technologies that take advantage of these sources should be environmentally benign. 

IIIater power originates from one of three sources the sun, Earths hot tU interior, or the moon. As you read the following descriptions of methods we use to harness energy from water, trace the energy to one of these three sources. 

HYDROELECTRIC POWER COMES FROM THE KINETIC ENERGY OF FLOWING WATER 

There is great potential for increasing the output of hydroelectric power, but not by building more dams. Only 2400 of the 80,000 existing dams in the United States are used to generate power. Many of these untapped dams could be fitted with turbines and generators. Furthermore, most hydroelectric dams in the United States were built in the 1940s, when equipment was not 

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What Are Sustainable Energy Sources think about possible energy sources, the enormous energy wealth at the heart of our solar system demands our... 

The future is by no means gloomy. Efficiency and sustainability are no longer restricted to academic circles. There is a drive to work on alternate energy sources and go "green." The changes in the public mindset are essentially mirrored by what has happened in the research realm, and have sparked the major revisions of the chapters in this book. 

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