There numerous of them but some of them would be contaminated soil which can be followed with altered soil chemistry that contains fewer soil organisms that are essential. The third one would be surface runoff due to extensively modified hydrology of the area. 
        
             
        
        
        
The answer for this is legumes.
        
                    
             
        
        
        
Answer:
There is no cure for ADHD. But there are several option to help with ADHD.
Explanation:
 
        
                    
             
        
        
        
Answer:
Air particles are a mixture of solids and liquids that are microscopically tiny and suspended by air currents. It can stay in the atmosphere for a few hours to a month or two. Their constituents can be various harmful substances such as heavy metals - lead, nickel, arsenic, cadmium or polycyclic aromatic hydrocarbons
Explanation:
Air particles, nitrogen dioxide and ground-level ozone are now considered to be the three most polluting substances in human health. Exposure during peak concentration and long-term exposure to these pollutants can cause damage from respiratory distress to premature death.
 
        
             
        
        
        
1 and 5, Solvent, and yh I am not sure but I think so