Kindler, gentler Krugman?

Do ya think that dinner at the White House convinced Professor Krugman to soften his demands for policy perfection?

If we’re going to get real action on climate change any time soon, it will be via some version of legislation proposed by Representatives Henry Waxman and Edward Markey. Their bill would limit greenhouse gases by requiring polluters to receive or buy emission permits, with the number of available permits — the “cap” in “cap and trade” — gradually falling over time.

It goes without saying that the usual suspects on the right have denounced Waxman-Markey: global warming isn’t real, emission limits will destroy the economy, yada yada. But the bill also faces opposition from some environmentalists, who are balking at the compromises the sponsors made to gain political support.

So is Waxman-Markey — whose language was released last week — good enough?

Well, Al Gore has praised the bill, and plans to organize a grass-roots campaign on its behalf. A number of environmental organizations, ranging from the League of Conservation Voters to the Environmental Defense Fund, have also come out in strong support.

But Greenpeace has declared that it “cannot support this bill in its current state.” And some influential environmental figures — most notably James Hansen, the NASA scientist who first drew the public’s attention to global warming — oppose the whole idea of cap and trade, arguing for a carbon tax instead.

I’m with Mr. Gore. The legislation now on the table isn’t the bill we’d ideally want, but it’s the bill we can get — and it’s vastly better than no bill at all.