Hydrogen and Oxygen. Better known as H2O
        
             
        
        
        
Answer:by reducing fossil fuel along with farming industries and also humans reducing gas emissions which isn’t good for us to breathe let alone our animals 
Explanation:
to build overpass with naturally grown grass as a bridge since they noemally follow the same path.
 
        
             
        
        
        
The deeper down you get, the colder the water is