Is nuclear or coal power better for the environment. Why?
Coal produces carbon dioxide when it burns, and also other gases like sulfur dioxide, depending how much sulfur is in the coal. Nuclear power does not produce any such chemical pollution, though it does produce active fission products. These are contained in the spent fuel and will not be released to the environment, not unless there is a major accident as at Chernobyl. Many people worry about the long term safety of the nuclear waste, and it is dangerous certainly, it just has to be handled very carefully and stored in a safe place.