| Term 
 | Definition 
 
        | An increase in the average temperature of the Earth's atmosphere. |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | The trapping of the sun's heat by gases in the Earth's atmosphere. |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | any gas in the atmosphere that contributes to the greenhouse effect |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | Fuels such as coal, oil, and gas. |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | The process in which farmland becomes less productive because land is degraded. |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | using natural resources in a way that they exist for future generations. |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | a gas composed of carbon and oxygen. |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | Substances discharged into the air. |  | 
        |  | 
        
        | Term 
 | Definition 
 | 
        |  | 
        
        | Term 
 | Definition 
 
        | the layer of air that surrounds earth. It consists mainly of oxygen. Nitrogen and carbon dioxide. |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | The careful management of energy so that less energy is used. |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | energy released from the splitting of atoms. |  | 
        |  | 
        
        | Term 
 | Definition 
 | 
        |  |