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By Nina Chestney LONDON (Reuters) - Global greenhouse gas emissions could rise 50 percent by 2050 without more ambitious climate policies, as fossil fuels continue to dominate the energy mix, the Organization for Economic Cooperation and Development (OECD) said on Thursday. "Unless the global energy mix changes, fossil fuels will supply about 85 percent of energy demand in 2050, implying a 50 percent increase in greenhouse gas emissions and worsening urban air pollution," the OECD said in its environment outlook to 2050.

Burning fossil fuels releases significant quantities of carbon dioxide, aggravating climate change. Although it gets less attention these days, combustion also emits volumes of pollutants, which can cause a variety of illnesses. The most extensive consequences across the U.S

Each year, human civilization consumes some 14 terawatts of power, mostly provided by burning the fossilized sunshine known as coal, oil and natural gas. That's 2,000 watts for every man, woman and child on the planet

Against all political intuition, Republican candidates could win votes by taking "green" positions on the controversy over climate change, according to new poll results released Tuesday. Voters

People love to prognosticate about how the world will power itself in the future. But only one person can be right. Here's some of the possible ways the next 50 years might turn out.

By Nina Chestney and Jackie Cowhig LONDON (Reuters) - Germany's plan to shut all its nuclear power plants by 2022 will add up to 40 million metric tons of carbon dioxide emissions annually as the country turns to fossil fuels, analysts said on Tuesday. [More]