For two years, President Barack Obama has used his executive power to impose new rules to cut carbon emissions, targeting cars and power plants, buoying environmentalists and infuriating industry.
His latest foray — regulating commercial aviation — had the opposite effect.
On Wednesday, the administration took a first step toward cutting greenhouse gas emissions from the nation's fleet of aircraft, releasing a scientific finding that said emissions from plane engines pose a risk to human health because they contribute to climate change.
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