Plastic bags: The Legislature failed to pass a measure that would have banned single-use plastic bags at grocery stores.

Why are environmental groups having a hard time swaying a Legislature dominated by Democrats?

The last time the Legislature passed a landmark environmental bill was in 2006. That was the global warming bill that set up the cap and trade system in California.

There are a couple of reasons why environmentalists are struggling to get traction. One theory, according to Rogers, is that Brown has given the word to Democrats that the state is still in recovery and they're still getting state finances under control. Another theory is that there are fewer journalists in Sacramento to keep an eye on legislators.

Rogers also said environmental groups need to reach out to a broader audience, especially Spanish speakers.

"What's fascinating to me is that when you poll Latino residents of California, they actually support tough environmental protections more than any other ethnic group. And for whatever reason, some of it is Latino leaders in the Legislature, some of it is environmental leaders, they're not really working together very well to build majorities," Rogers said.

Why did some environmental bills succeed?

In recent years, a lot of the environmental bills that have earned the governor's signature have been animal welfare bills: Two years ago the governor signed a ban on shark fin soup and this year's lead ammunition ban was aimed at stopping California condors from being poisoned. Rogers said other groups could learn from the Humane Society and the techniques they're using to gather support, such as rallying the public and using social media.

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Why Are Democratic Lawmakers Failing to Pass Environmental Bills?