We also lead the industry by reporting each product's greenhouse gas emissions on our website, and Apple products are superior in other important environmental areas not measured by EPEAT, such as removal of toxic materials.

CNN: Apple abandons green certification

Such wells yield plenty of gas as a by-product.

ECONOMIST: Shale gas is giving a big boost to America��s economy

United Utilities is converting a by-product of waste water at its Blackburn plant into gas.

BBC: United Utilities turns human waste to energy at plant

Over half of them involve reducing emissions of trifluoromethane, a by-product of refrigerant and Teflon production and an especially nasty greenhouse gas.

ECONOMIST: Climate change

For decades gas in remote locations was flared off as a nuisance by-product alongside more easily shipped oil.

FORBES: On The Cover/Top Stories

"Instead of betting on short-term cycles, people are investing in the longer-term story" of U.S. economic growth backed by innovation in shale-gas technology, said Kunihiro Asai, Nikko Asset Management's head of product development.

WSJ: Japanese Investors Start to Cut the Cord

The calculations go on to suggest that, had Scotland included oil and gas within its national accounting in 2010 and 2011, gross domestic product would have contracted by a full 3% last year.

BBC: A leak in the growth pipeline

By extracting electrons and energy-laden gas, his 2006-founded company, Cambrian Innovation, has developed a product that can cut the cost of treating wastewater by 30% to 60%, depending on the application area.

FORBES: Will Cambrian Innovation Revolutionize Waste Water Treatment?