More than 300 environmental, peace, and anti-nuclear groups and leaders published an open letter this week urging four prominent climate scientists to stop "embracing nuclear power" as a tool for curbing climate-changing pollution.
In response, one the four scientists reaffirmed his reluctant support for nuclear power, denying that he embraces the technology, but saying there's "no justification" for claims it could never become safe or affordable.
The debate among environmentalists over nuclear power flared up in November, when the four scientists published a letter calling for increased development and deployment of "safer nuclear energy systems." The letter was written by some of the climate community's best and brightest: NASA scientist-turned-activist James Hansen, Ken Caldeira of the Carnegie Institution for Science, Kerry Emanuel of MIT, and climatologist Tom Wigley.
That letter triggered a cavalcade of opinion articles, many of them arguing that nuclear power is too dangerous and much more expensive than wind and solar power. And now many critics of the scientists' arguments -- from tiny groups to big ones like Greenpeace USA and the Environmental Working Group -- have united to voice their opposition in this new letter. Here are some highlights: