IT'S MIDDAY AT THE HOME of Laurie and Larry David, a Tudor mansion in West Los Angeles with commanding views of the Pacific, and life, naturally, is imitating art. Or maybe it's the other way around. Events are unfolding in scenes that seem straight out of Curb Your Enthusiasm, the hit HBO series created and written by Larry.

Fade in: The clattering of keyboards fills the Davids' pool house. Despite its whitewashed pine walls and shabby-chic decor, the place feels like a newsroom bullpen, with three thirty-something women in heels, hip huggers, and headsets fielding a constant stream of phone calls, e-mails, and instant messages. Their boss, Laurie, a 47-year-old television producer, sits in the main residence, some 20 yards away, at a desk she's set up next to the giant clawfoot tub in her master bathroom.

The team is launching a mass-media campaign to get Americans fired up about the issue of climate change. Its centerpiece: the Stop Global Warming Virtual March on Washington—an interactive Web site (www.stopglobalwarming.org) and expanding online petition designed to create buzz while urging President Bush and congressional and business leaders to come up with stronger pollution-control laws and new clean-energy technologies. Her list of supporters, or "marchers," so far includes prominent Democrats and Republicans, among them Hillary Clinton, Al Gore, Arnold Schwarzenegger, and John McCain. Laurie's goal is to collect at least a million names by the next Earth Day—April 22, 2006—to send a message so loud that the White House will have to pay attention.

Bleep.

Voice of Laurie comes over the intercom (breathless): Omigod. You're not going to believe this—major slam dunk!

Staffers (in unison): What?!

Laurie: We got the Lutheran evangelicals! That's huge—hundreds of new marchers! And Walter Cronkite—possibly the most respected voice of news and reason in modern history. He wrote a protest statement so moving that I, like, literally have tears in my eyes.

(Two phones ring simultaneously.)

Staffer #1: Laurie, I've got Senator Barack Obama's office on Line 1.

Staffer #2: Take a message—AOL is on Line 2!