                                                                                                          —       6—9       6—9                           1012  
 
       21%                        Hx                                                                         SO  SO                              
                   —                                            
         79%                       NO No                                            
                         —                                                —                                                                                
                                                                                                        
                                                      
                                                                                     pAN                                        
   
                                      biosphere
                                       lithohspere
                                            hytrosphere
                                               atmosphhere
                                 oxygen family
                               oxygen cycle
                                                respiraation
                                                       decay
                                                               combustion
                                                       photosynthesis
                                                   oxidation
                                                        oxidizing agent
                                               reduction
                                                      reducing agent
                                                              pollutant
                                                                ozone
                                                      ozone cycle
                                                                Freon
                                          aerosol
                                                  potentiation
                                                           smog
                                         air temperature inversion
                                              photochemical smog
                                               coal smog
                                                        sufur oxides
                                                         particulates
                                                   nitrogen family
                                                 nitrogen cycle
                                nitrogen fixatjon
                                             nitrication
                              denitrification
                                                   nitrogen oxides
  —                     nitrogen dioxide—ozone cycle
                                         carbon family
                                       carbon cycle