What we know about a mysterious new pollutant, CO2, and the possible link to cancer

By LISA FELSTON, Associated PressWASHINGTON (AP) A mysterious new chemical pollutant may cause cancer in laboratory animals, raising new questions about the role of CO2 in climate change.The chemical, COX-2, is a powerful greenhouse gas, but its effects on animal health have not been fully explored, and there’s no way to know how long it […]