By Chris Megerian and Melanie Mason, Los Angeles Times.

Facing resistance from even some fellow Democrats, Gov. Jerry Brown and legislative leaders were scrambling Tuesday to find a compromise on a controversial bill that embodies some of the governor's most ambitious environmental goals.

With the end of this year's legislative session set for Friday, Brown’s senior aides have been holding private meetings to hash out final details on the measure, intended to slow climate change by slashing gasoline use on state roads, increasing energy efficiency and boosting renewable energy in California.

Possible modifications, reviewed by The Times and described by Capitol sources, would impose new limits on environmental regulators and alter the approach to cutting the volume of gas burned by California drivers.