Answer:
On Humans.
People exposed to high enough levels of 
certain air pollutants may experience: 
 Irritation of the eyes, nose, and throat
 Wheezing, coughing, chest tightness, and breathing difficulties
 Worsening of existing lung and heart problems, such as asthma
 Increased risk of heart attack
<u>On </u><u>Environment</u>
<em>Acid rain </em>
<em>Eutrophication</em>
<em>Haze</em>
 
        
             
        
        
        
Yes, people burn calories at different rates due to their metabolism.
        
             
        
        
        
I believe the answer to your question is 1,3,4, and 5.
If you are just getting off of drugs I wouldn’t think that you would be relaxed. If anything, I believe you would be feeling more anxious than normal.
I hope this is correct and that it helps you!
        
                    
             
        
        
        
In 1798 the first smallpox vaccine was developed.Over the 18th and 19th centuries,systematic implementation of mass smallpox immunization culminated in its global eradication in 1979.
        
             
        
        
        
Answer:
McDonald's is credit for the assembly line sysyem.