When scientists look at climate variations in the past, they don't see anything like today's warming.
No scientist disputes that carbon dioxide is a greenhouse gas and that it is increasing in the atmosphere. And careful detective work shows that the increase has chemical fingerprints — from us.
Coal generates carbon dioxide when combusted, which is causing the world to warm. In Georgia, a state that gets over 60 percent of its electricity from coal, some coastal residents are connecting the dots between coal and changes in the local ecology and economy attributed to global warming.