What substances act as greenhouse gases? Click on a respresentation of the gases below to see if they
                  are greenhouse gases.
                
                 
                    Ozone (O3)
                   
                    Nitrogen (N2)
                   
                    Carbon Dioxide (CO2)
                   
                    Water (H2O)
                   
                    CFC-11 (CCl3F)
                  
                  Why do some atmosphere susbtances act as greenhouse gases, while others are not?
                
              
