Warren Buffett, one of the richest men in the world and CEO of Berkshire Hathaway (which owns MidAmerican Energy, the nation's leading utility in energy), has invested $385 million to build wind-power plants, create geothermal.

At GE, CEO Jeff Immelt is betting that green technology will fuel the power and grow feedstock for ENERGY. next century of growth. GE sold $10 billion worth of clean-energy gear last year and plans to put $3 billion into clean-energy ventures by 2008.

Cascade Investments, the investment arm of Microsoft Chairman Bill Gates, has invested in Pacific Ethanol, a public company that is building a bio-fuels plant in California.

Virgin Group CEO Richard Branson plans to invest up to $400 million in a bio-fuel plant. He is also investing in wind power and trains that run on bio-diesel.

Microsoft co-founder Paul Allen has invested $2,500,000 into Seattle's Imperium Renewables, which plans to supply 40% of the growing U.S. market for diesel fuel made from vegetable oil and alternative feedstock by 2009.

Vinod Khosla, co-founder of Sun Microsystems, is a bio-fuels evangelist. In the latest of a string of alternative energy deals, Khosla Ventures and other investors are plowing $50 million into Bio-fuels startup by the name of "Altra".

Google co-founders Larry Page and Sergey Brin have invested millions of dollars in Palo Alto alternative-energy startup "NanoSolar”.

Over the past several years, FedEx, Staples, the Timberland Co., Archer, Daniels Midland, British Petroleum and corporate behemoth Wal-Mart have begun embracing green technologies at their stores and facilities.