Carbon dioxide (CO2) blood tests evaluate the presence of the gas in your blood. If your CO2 levels rise too high or fall too low, the test results may be an indication that you have a health ...

NEW YORK (Reuters Health) - People who suffer from the nighttime breathing disorder known as sleep apnea may develop high levels of carbon dioxide in the blood during the daytime -- a condition known ...

Surging emissions from wildfires may have been behind the increase, which was the largest since modern measurements began ...