Smoke rises from the Colstrip Steam Electric Station, a coal burning power plant in in Colstrip, Mont. Carbon dioxide is considered the chief gas linked to global warming.
Smoke rises from the Colstrip Steam Electric Station, a coal burning power plant in in Colstrip, Mont. Carbon dioxide is considered the chief gas linked to global warming. File photo The Associated Press
Smoke rises from the Colstrip Steam Electric Station, a coal burning power plant in in Colstrip, Mont. Carbon dioxide is considered the chief gas linked to global warming. File photo The Associated Press

Unimaginable signs creep up in climate change

June 23, 2014 2:57 PM