Carbon dioxide levels were around 280 parts per million (ppm) before the Industrial Revolution, when humans first began releasing large amounts into the atmosphere by burning fossil fuels.

We've long known that environmental factors – from humidity and temperature to trace chemical vapours – can influence how ...

The claim: Antarctica hasn't warmed for over 70 years because humans have only contributed 40 ppm of CO2 to the atmosphere A Dec. 1 Instagram video (direct link, archive link) shows a headline ...

This record, from the NOAA-operated Mauna Loa Observatory, near the top of Mauna Loa on the island of Hawaii, shows that carbon dioxide has been increasing steadily from values around 315 parts per ...

Despite these challenges, scientists see direct air capture (DAC) as a key strategy for reducing atmospheric carbon dioxide.

Her comment drew laughter from the spectators. The display turns green when the CO2 concentration is 1,000 parts per million (ppm) or less, because the figure indicates the air indoors is being ...

By 2050, atmospheric concentrations of CO2 will be 40 per cent higher than today’s levels if current trends continue, at roughly 570 parts per million (ppm). Many of today’s trees will still ...

Industrial activities including the burning of fossil fuels, however, have increased atmospheric CO2 levels by nearly 50%, from 280 parts per million just over a century ago to about 417 ppm today.

“Our response should have read: In the 2023-24 school year, air quality testing was completed in all schools in the ...