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[Editorial] Coming clean on power

On Aug 3, 2015, President Barack Obama and the US Environmental Protection Agency (EPA) jointly announced the Clean Power Plan, a sweeping overhaul of emission guidelines. Coal and natural gas remain the biggest contributors to carbon pollution (a third of all domestic carbon emissions) and with around 1000 ageing fossil-fuel power plants in the USA, the introduction of the first-ever national standards have necessarily made power plants crucial targets.