CO 2 is off the charts. Infographic by Alex Schwartz For nearly a million years, carbon dioxide levels in the atmosphere have maintained an average of about 280 ppm, not going above 300 ppm or ...

"Brief excursions towards lower values are still possible but it already seems safe to conclude that ... but data this year show levels remaining above the 400 ppm threshold.

A CO 2 level of 1,000 ppm, which is well above outside levels of about 400 ppm, could be relatively safe in a quiet library with masks but not in an active gym without masks. But in each indoor ...

Rándall Zúñiga, OIJ director, reported that tests conducted last Friday by a specialized Fire Department team and Forensic Engineering personnel detected dangerously high carbon monoxide levels—up to ...

Now, we are at a critical point in our recent history, because for the first time in recorded history, the level of CO2 has surpassed the symbolically important threshold of 400 ppm (parts per ...

Atmospheric carbon dioxide continued its rapid rise in 2019, with the average for May peaking at 414.7 parts per million (ppm ... and soils give off CO 2, which cause levels to rise through ...

In May last year, CO2 concentrations reached 410 ppm. Looking ahead, a study from the University of Michigan found that CO2 emissions could soar to levels not seen in 56 million years by the ...

The 400 ppm level is largely symbolic, representing nearly 150 percent of the CO 2 levels of pre-industrial times. Although scientists expect CO 2 levels to continue rising, the Northern ...