Wrong subject but it equals 1
        
                    
             
        
        
        
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Trees are responsible for around 50 percent of the oxygen on the planet, with the other half coming from the ocean. This shows how important our trees are; as well as the ocean.
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Is a framework of processes
        
             
        
        
        
<span>(in ancient Rome) a man trained to fight with weapons against other men or wild animals in an arena.   They did not entertain people. 
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Trompe-l'œil (French for '"deceive the eye"') is an art technique that uses realistic imagery to create the optical illusion that the depicted objects exist in three dimensions. Forced perspective is a comparable illusion in architecture.
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