A graph in this book shows that carbon dioxide in the atmosphere over the past 140 million years has declined in nearly a straight line from 2,500 ppm, 140 million years ago, to a dangerously low ...

Only carbon dioxide levels varied by segment: 600 ppm, 1,000 ppm or 2,500 ppm. The role-playing tests are more complicated than most used to measure cognitive abilities, notes epidemiologist and ...

The study indicates that carbon dioxide levels directly affect pilots' flight performance. ... 1,500 ppm, or 2,500 ppm, and each pilot flew one flight at each CO 2 level over the course of the study.

Commercial airline pilots were significantly better at performing advanced maneuvers in a flight simulator when carbon dioxide (CO2) levels on the flight deck (cockpit) were 700 parts per million (ppm ...

In about eight to 10 years, levels will not go under 400 parts per million, Butler said. And in terms of reaching new carbon dioxide highs, 450 will come even faster than than the change from 350 ...

Airliner cockpits can also have levels of carbon dioxide elevated enough that in simulations it causes pilots to fail test maneuvers at higher rates than normal, a new Harvard University study has ...

Commercial airline pilots were significantly better at performing advanced maneuvers in a flight simulator when carbon dioxide levels on the flight deck were 700 ppm and 1500 ppm than when they ...

Carbon dioxide is a villain in the climate change narrative, but coal plants and factories aren’t the only places that produce it. ... (600, 1,000, and 2,500 ppm) ...

The higher the carbon dioxide, the worse the test-takers did; at 2,500 ppm, ... As levels of carbon dioxide rose from 550 ppm to 945 ppm to 1400 ppm, ...

For the first time in human history and likely for the first time in at least 800,000 years, the average level of carbon dioxide (CO2) in Earth's atmosphere topped 400 parts per million for an ...