Mankind's response to climate change will shift how the world gets its energy and is already making "green barons" out of early investors in renewable energy, clean technologies and carbon trading.
Reuters spoke to four entrepreneurs who are cashing in on the energy revolution and who say there is more money to be made.
BRUCE KHOURI, co-founder of Solar Integrated Technologies, based in Los Angeles, has at the age of 48 made $5 million by cashing in shares in the company.
He still has a $11 million stake in the company, which makes lightweight solar panels for commercial roofs. He saw the opportunity while running his own industrial roofing firm....