For 67 years, the observatory on Hawaii's Mauna Loa volcano has been taking these measurements daily  — tracking the invisible gas that is building up in our atmosphere and changing life on Earth.

Atmospheric concentrations of carbon dioxide made history last month by climbing to their highest seasonal peak available in historical records, a team of researchers reported. For the first time ...

For the first time on record, monthly average CO2 levels exceeded 430 parts per million (ppm), according to experts at ...

For the first time on record, monthly average CO2 levels exceeded 430 parts per million (ppm), according to experts at ...

Another year, another record,” quipped Ralph Keeling, head of the Scripps CO2 Program, as atmospheric carbon dioxide hit 430 ...