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Cloud computing has been hailed as the best way to provide any data to any gadget at any time. Unfortunately, all this ubiquity comes at a cost--the data centers that store, send and receive all of that data consume a lot of energy, most of it from fossil fuels. [More]

By Deborah Zabarenko, Environment Correspondent WASHINGTON (Reuters) - To measure a country's greenhouse emissions from fossil fuels, it makes sense to consider the whole carbon supply chain, from oil well or coal mine to a consumer's shelf, scientists reported on Monday.

Oil money has conjured up a pricey experiment in sustainability in a patch of desert between downtown Abu Dhabi and its airport. There, the city of Masdar ("the source") is rising. It is meant to signal a shift away from fossil fuels by hosting a variety of ecofriendly approaches, such as a system of subterranean electric cars--Personalized Rapid Transit--that whisk visitors and residents from point to point.