Solar Centers
The sun has produced energy for billions of years. Solar energy is free, and its supplies are unlimited. Every year, the Earth absorbs 3,850,000 exajoules (EJ) of solar energy. In one hour, the amount of energy absorbed by the planet's oceans and landmasses is more energy than the world consumes in an entire year. With lower costs and increased efficiency of solar technologies, solar energy is becoming a major player in the renewable energy industry.
One of solar energy's great advantages is that it allows electricity to be produced cleanly in the place where it is consumed, a practice known as distributed generation. Since sunlight hours overlap nicely with peak demand, solar panels produce electricity when it is both most expensive and most needed. Given that peak demand drives the production of new power plants, reducing peak load through large-scale solar generation can improve air quality both by generating electricity without pollution and by making additional peak power plants unnecessary.
Solar energy is a growing technology with tremendous promise, as the photovoltaic industry's annual growth rate suggests. In 2007, the total installed...
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