"Thanks." PhD student dismantles longstanding myth about pressing global issue: 'It's factual information, but it's presented ...

In some urban areas there will be so much human activity that the ambient CO2 levels are higher than global averages. Midtown manhattan is something like 460 PPM for CO2 vs 420 globally.

Scientists fear an "irreplaceable" loss of key climate data as Trump's cost-cutting plans target a key CO2 monitoring site in ...

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 ...

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.

Atmospheric concentrations of carbon dioxide have been steadily rising, from approximately 315 ppm (parts per million) in 1959 to a current atmospheric average of approximately 385 ppm (Keeling et al.

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.

Climate experiment in a forest in Staffordshire, UK, is testing how trees respond to higher levels of carbon dioxide in the air ...

According to Bowling, new tests conducted days ago showed CO2 levels dropped below 1,000 ppm. “CO2 levels are not elevating as rapidly. We are still seeing levels can rise when you have a lot of ...