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Energy: America's top climate cop

The United States has abandoned comprehensive greenhouse-gas curbs, but California is pressing ahead. Mary Nichols is leading the fight against emissions.

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Jeff Tollefson covers energy and environment for Nature in Washington DC.

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CARB climate programme

Northeastern Regional Greenhouse Gas Initiative

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Tollefson, J. Energy: America's top climate cop. Nature 473, 268–270 (2011). https://doi.org/10.1038/473268a

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