Sentences with phrase «current atmospheric levels»

The model's YGP predictions for current atmospheric levels of carbon dioxide agreed reasonably well with the actual number of hurricanes seen in a typical year.

In addition, EPA will likely have to establish national ambient air quality standards (NAAQS) for greenhouse gases set below current atmospheric levels.

CO2 is a necessity of life itself since it makes possible green plants, the basis for animal life on Earth, and improves plant growth at current atmospheric levels

If the study is indeed an accurate representation of the effects of CO2 on humans, though, it will come as a big surprise to the US navy submarine service, where CO2 concentrations frequently reach 8,000 ppm (20 times current atmospheric levels) with few observed adverse reactions.

Since the EPA defines the relevant «air pollution» as the «elevated concentrations» of greenhouse gases in the atmosphere (Endangerment Rule, p. 66516), the agency would have to set the NAAQS below current atmospheric levels.

the differences between pre-industrial and current atmospheric levels are due to human additions of CO2 to the atmosphere.