In terms of air pollution, nuclear reactors beat fossil-fuel-burning power plants hands down. But enviros have long campaigned against nuclear power anyway, noting the dire consequences of uranium mining, the difficulty of storing radioactive waste, and the devastation that could result from an accident at an atomic power station. Now more than ever, with growing concern about terrorist attacks on nuclear plants, this energy source simply doesn't seem to be worth the risk. Yet the Bush administration is pushing hard for the construction of the first new nuclear power plants in the U.S. in three decades. Journalist Amanda Griscom weighs in on nuclear energy in Powers that Be, only on the Grist Magazine website. (Got strong feelings about nuclear power? You can weigh in, too, by sharing your thoughts on The Gristmill, our online discussion forum.)