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Some engineers are dusting off an old idea for storing energy—using electricity to liquefy air by cooling it down to nearly 200 °C below zero. When power is needed, the liquefied air is...
A new language was introduced in Washington when President Barack Obama began his first term in office. For a time, it flummoxed his observers, including many Republicans, who were caught...
Last month the International Energy Agency (IEA) reported that the amount of carbon dioxide emitted for each unit of global energy use was essentially unchanged between 1990 and 2010,...