A reliable indicator of the air quality in offices, classrooms, or living rooms is the CO2 content. In fresh air, the ...

The end of spring heralds a grim anniversary at the Mauna Loa Observatory in Hawaii. Since 1958 scientists at the station have been measuring the concentration of carbon dioxide (CO 2) in the ...

Levels of carbon dioxide in the Earth’s atmosphere have soared to levels that are now more than 50% higher than in preindustrial times, scientists with the National Oceanic and Atmospheric ...

Smoke rises from a factory as a truck loaded with cars crosses a bridge in Paris in 2018. (AP Photo/Michel Euler, File) (CN) — The levels of carbon dioxide are the highest in human history, according ...

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, ...