What is the disadvantage of using coal to generate electricity?

There are several disadvantages to using coal to generate electricity. When coal is burned, it releases lots of carbon dioxide, which is a problem because the atmosphere already has too much carbon dioxide and it is causing global warming. In addition, there are impurities in coal which result in other forms of air pollution, particularly sulfur dioxide which results in acid rain. Coal mining is also a dangerous activity that results in many deaths. And although there is a lot of coal, it is still not a renewable resource, and it will eventually run out, if we continue to burn it.