Sustainability is defined as patterns of economic, environmental, and social progress that meet the needs of the present day without reducing the capacity to meet future need. Sustainable energy refers to those patterns of energy production and use that can support society's present and future needs...

According to the Solar Energy Industries Association reports there was a 67% increase in the solar industry from 2009 to 2010 in the United States. In addition to 67% sales increase, the U.S. solar equipment was installed in 2010 a total capacity of 956 megawatts, and the same year, a total generati...

INTRODUCTION The world has never been short of wind. For thousands of years, it has turned windmills, flown kites, cooled houses and filled sails. Now, technological advances are breathing new life into our use of wind power as a clean, renewable, cost-effective means of generating electricity. ...

Since the discovery of petroleum in the 1860s, fossil fuels have become the foremost source of power in the world. For over a century after their inception, their availability was very seldom called into question. The oil crisis of 1973, however, brought this issue to the forefront. With the widespr...

1. Population Now the population of the world has reached 6 billion in 2000. And it is estimated to have 10.5~11 billion of population until the population of the world will stabilize. This means that the world will need to provide food, shelter, cloth for the addition of 5 billion people. But this...