German Chancellor Angela Merkel has endorsed an initiative to shut down its nuclear power plants by 2022. The move underscores growing concerns following the events at Japan's Fukishima nuclear power plant.
Freakonomics Radio's Stephen Dubner talks about the idea of "conspicuous conservation," where people indulge in certain earth-saving acts as a way to show off that they care about the environment, and in turn, benefit socially.
The Japanese government has expanded the evacuation zone surrounding the Fukushima Daiichi nuclear plant after several explosions. The fires, triggered by the earthquake, have caused a surge in potentially toxic radiation.