The increase in tropospheric chlorine (green line), caused by manufacturing of chlorofluorocarbon gases, led to increased ozone depletion (black line), which led to increased temperature (red bars). Note how carbon dioxide concentrations continue to increase after 1998, while chlorine, ozone depletion, and temperatures all stopped increasing. Ocean heat content continues to increase because ozone remains depleted.
Global warming by one degree between 1965 and 1998 was caused by a rapid increase in manufacturing of chlorofluorocarbon gases (CFCs) used in aerosol cans, refrigerators, air conditioners, and certain fire extinguishers, which depleted ozone, causing the Antarctic Ozone Hole, major depletion in the Arctic, and more moderate depletion at mid-latitudes.