aeronomia aerosols air atmosphericchemistry atmosphericozone aufsatzsammlung bibliography chlorofluorocarbons climaticchanges climatology congresses earthsciences effectofclimateon effectofhumanbeingson environmentalaspects forschung geschichte1879-2000 globalwarming governmentpolicy humanbeings juvenileliterature mensch meteorology nature ozon ozone ozone-depletingsubstances ozonelayerdepletion ozonschicht philosophy pollution pollutionprevention science stratospha˜re stratosphere troposphere ultravioletradiation