In the wake of the Fukushima nuclear disaster a year ago, Germany closed some of its nuclear power plants. Some have since reopened, but others never will.
Fukushima's most important lesson is this: Probability theory (that disaster is unlikely) failed us. If you have made assumptions, you are not prepared. Nuclear power plants should have multiple, reliable ways to cool reactors. Any nuclear plant that doesn't heed this lesson is inviting disaster.
Green revolution: Fast-track breeding is beginning to develop crops that can produce more and healthier food – without controversial genetic engineering.
One year after the Japan earthquake and tsunami, a resident finds gratitude and cooperation amid the devastation.
Should we be concerned? A nuclear official said in passing this weekend that problems in 14 areas need to be resolved. In the wake of Fukushima, a shade more transparency would be welcome.