Natural gas is highly explosive, invisible, poisonous, and odorless. Yet we accept natural gas, even though it kills not two but 400 Americans a year, because it was introduced before we got crazy about risk. We accept coal, even though mining it is nasty and filthy and kills dozens of people every year. By contrast, we're terrified of nuclear energy. Chernobyl, the worst nuclear power disaster ever, killed only 30 people. Some say the radiation may eventually kill others, but even if that's true, natural gas kills more people every year.