Atmospheric CO2 reached an average of 424 parts per million in May, an increase of 3 parts per million over the same time last year. NOAA says this is the fourth steepest single-year climb it has ...

Earth inhales and exhales carbon, indicating where and when vegetation is growing (sucking up carbon dioxide) or dying off ...

Carbon dioxide levels in May averaged 424.0 parts per million (ppm) – the fourth-largest annual increase since measurements began 65 years ago at the NOAA observatory in Mauna Loa, Hawaii.

Carbon dioxide levels are now comparable to the Pliocene Climatic Optimum, between 4.1 and 4.5 million years ago, when they were close to, or above 400 parts per million.

An area with high CO2 levels may put you at higher risk for infection, while a space with low CO2 levels can be considered safer, says University of Colorado-Boulder professor Jose-Luis Jimenez.

Debate has resurfaced as the Trump administration moves to change EPA rules.

By analyzing oxygen isotopes in dinosaur teeth, scientists revealed Mesozoic CO₂ highs, plant growth surges, and volcanic ...

As both CO2 and respiratory viruses are present in exhaled air, it makes sense that CO2 concentration is used as a proxy indicator of viral transmission risk. Here, we need to delve a little ...

Our rating: False Global temperature and CO2 levels are correlated and both have risen overall since the late 1880s, according to researchers. However, the Earth's average temperature fluctuates ...

New research reveals rising CO2 levels are disrupting insects, including cotton bollworm moths, ability to select optimal egg ...

The heat-trapping carbon dioxide levels in the air peaked in May, in amounts nearly 50% higher than when the Industrial Age began, and they are growing at a record fast rate, scientists said.