Man-made disasters are usually the result of things going wrong in our complex technological society. They include: blackouts, hazardous material spills, air pollution, house fires, radiation leaks, food or water contamination, and industrial chemical releases. In the best case, they simply rob us of our modern luxuries for a brief time. In the worst case, they impact the entire ecosystem in which we live. A profound example of a man-made calamity is the 1986 Chernobyl nuclear power plant accident that, according to the World Health Organization, exposed six million people to dangerous levels of radiation and left a portion of our planet nearly uninhabitable.