In the massive federal spending package that Congress passed this week, just in time to head off a government shutdown, lawmakers showed they are in no hurry for the clean energy future.

They strategically slashed most of the tax credit extenders that analysts saw as this Congress’ best opportunity to accelerate renewable energy and cut U.S. greenhouse gas emissions. All that remained of the package at the end of months-long negotiation and debate were measures that will be politically useful to Republicans—most notably, biofuel subsidies.

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