While scientists ponder how quickly the polar ice cap will become a tropical resort — and California turns the heat up on the auto industry — law firms are starting to wave their green flags.

Soon after California Attorney General Bill Lockyer announced he was suing carmakers over vehicle pollution, and the state passed a new law to limit greenhouse gas emissions, Pillsbury Winthrop Shaw Pittman announced it was putting together a new climate change and sustainability practice group. And Morrison & Foerster announced an event to discuss the new Global Warming Solutions Act.