claim: The trend in CO2 at Mauna Loa is practically identical to the global trend because CO2 mixes well throughout the atmosphere.
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.
category: Carbon dioxide