An observatory high on Hawaii's Mauna Loa volcano that measures carbon dioxide in the atmosphere has reported its highest ever seasonal peak concentration of the greenhouse gas. For the first time, ...

These data come from the National Oceanic and Atmospheric Administration’s Mauna Loa Observatory, which may soon be shut down because of proposed government budget cuts ...

Carbon dioxide levels in the atmosphere increased to a record high in 2023, even as countries promise to lower their emissions, the World Meteorological Organization reported Monday. The WMO, an ...

Earth’s atmosphere now has more carbon dioxide in it than it has in millions — and possibly tens of millions — of years, according to data released Thursday by the National Oceanic and Atmospheric ...

The average level of carbon dioxide in the Earth’s atmosphere had its largest one-year increase on record between 2023 and 2024. In 2024, the level reached 423.9 parts per million, an increase of 3.5 ...

The same molecule heating Earth’s surface is cooling the layers above it at a startling rate. A study published in Nature ...

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 ever ...

Carbon dioxide levels in the atmosphere reached a record high in April, averaging 431 parts per million (ppm), according to ...

Scientists are trying to understand why the amount of CO2 in the atmosphere changed by about 90 parts per million (ppmv) between icy (glacial) and warmer (interglacial) periods in Earth’s history.

New reports out of the NOAA and Scripps Institution of Oceanography suggest that the carbon dioxide (CO2) levels in Earth's atmosphere haven't been this high in millions of years. It's a striking ...