Peugeot unveils petrol hybrid using compressed air

French carmaker PSA Peugeot Citroen unveiled Tuesday a petrol hybrid engine that stores energy using compressed air which it hopes will be a game-changing technology to improve energy efficiency.

Declining energy quality could be root cause of current recession

An overlooked cause of the economic recession in the U.S. is a decade long decline in the quality of the nation's energy supply, often measured as the amount of energy we get out for a given energy input, says energy expert ...

Learning from a circular economy pioneer

Back in the 1990s, 60 percent of waste went to landfill in the Swedish city of Lund. Today it's less than 2 percent, and the region is a pioneer of the burgeoning circular economy.

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