text: The EPA regulations are said to be necessary to reduce greenhouse gas emissions, primarily carbon dioxide (CO2) which the Greens deem to be a pollutant in our atmosphere. It is not a pollutant, despite a Supreme Court decision that identifies it as such, but rather a gas vital to all life on Earth, used by all vegetation for its growth. CO2 is to vegetation what oxygen is to all animal life. Humans, all seven billion of us, exhale CO2!