Apart from the catastrophic consequences the tsunami has had in Japan, harming millions and killing thousands of people, there are also secondary impacts on the environment. I am sure you can follow the most tragic consequences on the news; for now I’d like to focus on some environmental consequences.
For one is the effect the nuclear emergency in Japan is having on popular perception around the world on nuclear energy. There is an article here that explains this, and recently German Chancellor Angela Merkel took extreme measures with regards to her countries own nuclear reactors. This could seriously affect future energy policies around the world with regards to nuclear energy, seen as the most viable non carbon emitting alternative to fossil fuels. This would severely affect climate policy and mitigation efforts as a consequence, or at least its aspirations.
Meanwhile, Pielke Jr. has a piece here showing nuclear may not go away so easily.