Climate Changed

Climate Scientists Alarmed by Trump’s Move to Undercut Auto Emission Rules

  • Autos are now single biggest U.S. source of greenhouse gases
  • Environmentalists warn of a setback in climate change battle

Vehicles travel on the Oakland-San Francisco Bay Bridge in San Francisco, California.

Photographer: David Paul Morris/Bloomberg
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In the fight against climate change, gas-guzzling cars are increasingly seen as the biggest enemy.

Carbon dioxide from automobiles has surged in the U.S. at the same time that the emissions have declined from power plants. The transportation sector is now the nation’s single biggest source of greenhouse gas emissions -- beyond electrical generation from coal, leaking oil wells and burping cowsBloomberg Terminal.