U.N. special envoy on climate change Dr. Gro Harlem Brundtland and her 22-person international commission started warning countries to avert global warming in 1987. Twenty-five

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World leaders at the G20 summit in Pittsburgh debated curbs in carbon dioxide emissions but scientists such as Klaus Lackner are pioneering solutions to capture

The founders of Natcore Technology had a vision. They wanted to create a thin film for solar cells that would decrease the amount of silicon