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.

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 ...

Sediment records from the Andes suggest tropical land where millions live could heat up faster than expected as greenhouse gases rise.

The climate crisis is not a distant threat; it's happening right now and affecting what matters most to us. Hurricanes intensified by a warming planet and drought-fueled wildfires are destroying our ...

There's now more carbon dioxide (CO2) in the atmosphere than ever before in human history, scientists have revealed. For the first time on record, monthly average CO2 levels exceeded 430 parts per ...

Atmospheric carbon dioxide levels jumped by a record amount in 2024 to push concentrations to their highest point since measurements began, the UN’s World Meteorological Organization (WMO) has ...

Earth’s atmosphere contains carbon dioxide, which is good for life on Earth – in moderation. Plants use CO2 as the source of ...

Our species likes it cold. Homo sapiens evolved in — and still inhabits — one of Earth’s rare and fragile ice ages, periods distinguished not by an abundance of saber-toothed cats and woolly mammoths ...

Carbon dioxide may be a naturally occurring substance on Earth, but too much of its presence has contributed to global warming, climate scientists say. Carbon dioxide, known by the chemical formula ...

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 ...