Atmospheric lifetimes of chlorofluorocarbons 11 and 12 and carbon tetrachloride are estimated to be 50, 86, and 41 years respectively, according to satellite measurements of stratospheric chemistry.

Kepler, the celebrated German astronomer, believed that the earth was a real living animal, that the tides were due to its respirations, and that men and beasts were like insects feeding on its back.

Earth's atmosphere. Learn about threats to air quality, the latest scientific research in atmospheric chemistry, atmospheric physics and more.

Atmospheric science articles from across Nature Portfolio Atmospheric science is the study of the dynamics and chemistry of the layers of gas that surround the Earth, other planets and moons. This ...