if the Earth had 5% more oxygen in the atmosphere Global warming will happen.
 
        
             
        
        
        
Answer:
This article discusses a group of scientists who are studying an ecosystem. What ecosystem are the scientists studying? A the Hudson River ecosystem.
Explanation:
 
        
             
        
        
        
Explanation:
the last option is the correct answer 
 
        
             
        
        
        
Energy cannot be destroyed