The Biggest Bang for the Climate-Change Buck?

The world is full of efforts and estimates toward reducing carbon emissions. A new paper by David Wheeler and Dan Hammer argues that the best bang for the climate change buck may lie in family planning and girls' education: $1 million spent could save 250,000 tons of CO2.

Matthew Kahn Answers Your Climatopolis Questions

Last week, we solicited your questions for Matthew Kahn, the author of Climatopolis: How Our Cities Will Thrive in the Hotter Future. His answers, covering everything from water scarcity to Moscow's recent heat wave, are below. A big thanks to Matt - and to everyone who participated.

How Cities Adapt: A Q&A With Climatopolis Author Matthew Kahn

There are plenty of dire predictions about what will happen to our cities if the worst predictions about global warming were to come true: flooding, droughts, famine, chaos and massive death. But Matthew Kahn, an economist at UCLA's Institute of the Environment and Sustainability, sees a different future. He tells that story in his new book Climatopolis: How Our Cities Will Thrive in the Hotter Future.

Explosive Climate-Change Video a Bit Too Explosive

The British environmental group 10:10, devoted to cutting carbon emissions 10 percent each year, created a message video that was a bit too explosive for its own good. The gist: any poor sap who fails to go along with the 10 percent cut, be it a schoolchild or a soccer star, is blown to smithereens.

Geoengineering: "The Horrifying Idea Whose Time Has Come"?

In Washington, D.C., this morning, the New America Foundation (in partnership with Arizona State University and Slate) is holding a "Future Tense Event" called "Geoengineering: The Horrifying Idea Whose Time Has Come?"

Horse Manure: The Gift That Keeps on Giving

A story told on pp. 8-11 of SuperFreakonomics - about the plague of horse manure, the introduction of the automobile (an "environmental savior"), and the resulting carbon emissions -- has been turned into (of all things) a Mercedes-Benz commercial.

Global Warming Vs. Street Crime

In the Wall Street Journal, Jean Guerrero writes an interesting article about how cities are fighting street crime by the simple act of leaving the lights on deeper into the night. (Other cities have tried Barry Manilow music, with some success.) But leaving the lights on all night doesn't always jibe with a city's budget plans -- or its global-warming conscience.

Unemployment Vs. Global Warming

Is thinking green a luxury?

The Arctic in Pictures

A few months ago, Dubner snapped some iPhone pictures of the Arctic from an airplane. If you're hankering for some professional photos, check out FP's photoessay "The Ice Kingdom."

What We Talk About When We Talk About Climate Change

Dealing with the media, by the IPCC.