The atmospheric concentrations of carbon dioxide, methane, nitrous oxide, chlorofluorocarbons, and tropospheric ozone have all increased over the past century.
(The atmospheric concentrations of carbon dioxide, methane, nitrous oxide, chlorofluorocarbons, and tropospheric ozone; have increased; T:over the past century)
The atmospheric concentrations of carbon dioxide, methane, nitrous oxide, chlorofluorocarbons, and tropospheric ozone
have increased
T:over the past century