Energy can neither be created nor destroyed.
Energy can only be changed from one form to another.
 
        
             
        
        
        
The use of more resources lead to a decrease in resources, therefore the need for more resources. More people means the more need for shelter. More people means more industrialisation to provide for the needs and wants of life.
        
             
        
        
        
Answer:
The objective itself is usually a cylinder containing one or more lenses that are typically made of glass; its function is to collect light from the sample.
Explanation:
A telescope mirror can be made from glass that is somewhat less pure than that used to make a lens, since light does not pass through it.
If you have any questions feel free to ask in the comments - Mark
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