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Nature 438, 1091-1092 (22 December 2005) | doi:10.1038/4381091a; Published online 21 December 2005

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Atmospheric physics: Reflections on aerosol cooling

Jim Coakley1

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By changing the composition of Earth's atmosphere, human activity has both a warming and a cooling effect on the planet. According to new calculations, that latter influence is large, but it is likely to be declining.

The Earth is warming because of rising concentrations of greenhouse gases in the atmosphere. But some of the human activities that produce those gases, including burning of fossil fuels and biomass, also produce hazes that partially offset the warming.

  1. Jim Coakley is at the College of Oceanic and Atmospheric Sciences, 104 COAS Admin Building, Oregon State University, Corvallis, Oregon 97331-5503, USA.
    Email: coakley@coas.oregonstate.edu

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