Tim,
"Hazardous" and "Toxic" are not synonymous. Some Hazardous Substances/Waste are not considered "Toxic" (though most substances are toxic at some concentration) but most "Toxic Substances/Waste are also "Hazardous". I'm referring to the definitions of those terms as used in EPA's Resource Conservation Recovery Act (RCRA) program and under TSCA (Toxic Substance Control Act) Programs. I believe the EPA declared CO2 as a pollutant in order to control and regulate their emmissions. I caution about using any media outlet as a source for any scientic or techincal information. I've dealt with many reporters over the years and most just don't have the scientific background to grasp these terms or issues. So you have lots of company there. Stick to what you know.
pollutant (p-ltnt)
A substance or condition that contaminates air, water, or soil. Pollutants can be artificial substances, such as pesticides and PCBs, or naturally occurring substances, such as oil or carbon dioxide, that occur in harmful concentrations in a given environment. Heat transmitted to natural waterways through warm-water discharge from power plants and uncontained radioactivity from nuclear wastes are also considered pollutants.
Bill Buskey
Environmental Program Specialist
Hazardous Waste Inspector for 20 years.
Hazardous Waste Remediation for 7 years