According to a report, the market for so-called "green" energy sources has grown by 68 percent since 2002 and could reach $102.4 billion annually by 2014.

Clean Edge, a research and publishing firm in California, released a report stating that the renewable energy market could grow significantly within 10 years. According to the report, the market for so-called "green" energy sources has grown by 68 percent since 2002 and could reach $102.4 billion annually by 2014. Over the past three years, Clean Edge has consistently underestimated the growth of this industry.

At $100 billion per year, renewable energy sources, including wind, solar and hydrogen, still only represent a fraction of the fossil fuel market that realizes several trillion dollars per day. But with ever-declining renewable energy costs and increasing fossil fuel costs - oil has already passed $58 per barrel and could rise as high as $80 - renewable sources are expected to rapidly grow.

States have taken the lead in changing over to renewable energy, with 18 states having issued rules commonly known as renewable portfolio standards. These rules require as much as 25 percent of the power used in the state to come from renewable sources at a specified future date. Visit Clean Edge at www.cleanedge.com