Kenneth Berlin and his team at Skadden, Arps, Slate, Meagher & Flom have been working on climate-related matters for years. He headed the Justice Department’s Environmental and Natural Resources Division, chaired the Environmental Law Institute and has shepherded a mountain of environmental litigation for major corporations.

Skadden hadn’t needed a climate change group before: It simply tapped environmental, energy regulatory, intellectual property and tax lawyers to help out when the need arose. Partners, however, at the nation’s highest-grossing law firm have changed their minds: This week, they were scheduled to launch a 23-lawyer group specifically devoted to climate change issues.