Conservatives repeat inane claim that CO2 can't be a pollutant because "we breathe" it
May 21, 2009 12:06 pm ET
SUMMARY: Pointing to the natural occurrence of carbon dioxide, media conservatives have ridiculed the idea that it can be harmful to the environment. But scientists do not assert that it is inherently harmful; they point to the danger posed to the atmosphere by excessive discharges of CO2.






