claim: Although it has some very important and beneficial effects, CO2 meets the legal and encyclopedic definitions of a pollutant, and human CO2 emissions pose a threat to public health and welfare.
evidence: American Public Health Association Policy Statement Addressing the Urgent Threat of Global Climate Change to Public Health and the Environment, 2007, archived from the original on 2009-12-31 The long-term threat of global climate change to global health is extremely serious and the fourth IPCC report and other scientific literature demonstrate convincingly that anthropogenic GHG emissions are primarily responsible for this threat….US policy makers should immediately take necessary steps to reduce US emissions of GHGs, including carbon dioxide, to avert dangerous climate change.