but they spit out a bunch of other nasty stuff too. Plus: consider death tolls of each power source per KWh:
http://www.washingtonpost.com/national/the-human-toll-of-coa...
http://www.washingtonpost.com/national/the-human-toll-of-coa...
Newer or upgraded coal power plants have less effects.
But generally this is not a beauty contest. Coal power plants have to go. Unfortunately it will take a lot of time and money to replace (or even upgrade) the existing ones.