Global Warming - Causes 
              Causes of Global Warming 
              
                - 
                  
Rapid use of fossil fuel 
                 
                - 
                  
Rapid use of fossil fuel will emit large amount of greenhouse       gases, especially carbon dioxide.   
                 
                - 
                  
Deforestation/clearing of lands 
                 
               
              The increase of human population coincidentally demands for more  lands to use. This leads to clearance of forest area in many regions. By  eliminating forests, carbon dioxide that actually should be photosynthesized is  left in the atmosphere and accumulate to contribute to the increase.  
              
              CFC, or chlorofluorocarbon is a gas that decreases ozone (O3)  in the atmosphere, causing ozone depletion that increase the amount of solar  radiation arriving to the Earth.  
                
                
              Open burning of trash 
              Open burning of trash worldwide emits greenhouse gases.  
              
                
                  - Vehicle and industrial emissions 
 
                  - Volcanic eruptions.
 
                 
              |