Just how insane was the early 21st-century CO2 scare?

Two years after the peak of US CO2 hysteria, the country's largest HMO issues a press release about the alleged dangers of trace amounts of carbon dioxide

"Participation in the California Climate Action Registry represents a critical step toward effectively managing greenhouse gas emissions and improving Kaiser Permanente's overall sustainability efforts," said Kathy Gerwig, Kaiser Permanente's vice president for Workplace Safety and environmental stewardship officer. "Climate change will cause health effects that directly impact Kaiser Permanente's ability to fulfill our mission of quality, affordable health care. At Kaiser Permanente, we believe a preventative approach to community health, and reducing greenhouse gas emissions is part of preventing the spread of infectious diseases and other health effects of climate change."

Kaiser Permanente: Information from Answers.com

Kaiser Permanente is the United States' largest integrated health maintenance organization (HMO).