The Mauna Loa Observatory in Hawaii, which has been at the forefront of global climate monitoring since the 1950s, is facing ...

Cutting data climate collection – as the Trump administration is now trying to do – is like breaking a thermometer to avoid ...

The Mauna Loa laboratory in Hawaii has measured atmospheric carbon dioxide, which — along with other planet-warming pollution ...

The greenhouse effect was discovered more than 150 years ago and the first scientific paper linking carbon dioxide levels in the atmosphere with ...

In 1958, when the Keeling Curve began, the concentration of CO2 in the Earth’s atmosphere was 313 parts per million. In 2024, that had risen to 424.61 ppm, and this year, monthly average CO2 ...

Explore major US climate policy reversals under Trump. Learn how changes impact clean energy, public lands, and conservation efforts. Read now!

One of my favorite annual traditions is to ride my electric mountain bike up Aspen Mountain on the summer solstice. There at ...

Keeling’s father, Charles David Keeling, pioneered global carbon dioxide monitoring at Mauna Loa, establishing the famed Keeling Curve—a graph that has tracked the relentless rise of ...

New Record for Annual Increase in Keeling Curve Readings (Jan. 16, 2025) During Year of Extremes, Carbon Dioxide Levels Surge Faster than Ever (June 5, 2024) Canals Used to Drain Peatlands Are ...