DEQ Blames CO2 for Polluting Stream near Midwest

The Wyoming Department of Environmental Quality says carbon dioxide bubbling up from the ground could be responsible for killing six ducks and polluting a stream near Midwest. 
The gas could have come from Anadarko Petroleum's CO2 injection program that has rejuvenated oil wells in the Salt Creek Oil Field. 
The DEQ has ordered Anadarko to identify and control the carbon dioxide that leaked into Castle Creek. Anadarko must also monitor the stream's acidity. 
Company spokesman Dennis Ellis says Anadarko has not yet verified where the CO2 originated.