claim: Less energy is escaping to space : Carbon dioxide ( CO2 ) acts like a blanket; adding more CO2 makes the 'blanket' thicker, and humans are adding more CO2 all the time.
evidence: Increases in atmospheric concentrations of CO 2 and other long-lived greenhouse gases such as methane, nitrous oxide and ozone have correspondingly strengthened their absorption and emission of infrared radiation, causing the rise in average global temperature since the mid-20th century.