small chicken farms turned into factories because it was cheaper to  
maintain and it also made it cheaper for people to buy eggs. However  
this produced a huge problem of what to do with the chicken manure  
and this is also a problem amongst other types of livestock as well as well as factories having big oil spills hope this helps sorry didnt know what you wanted for a answer
 
        
             
        
        
        
As Earth orbits the Sun, this same principle is used by astronomers to determine the distance to nearby stars. ... Parallax is the first "inch" on the yardstick with which astronomers measure distances even further to objects.
 
        
             
        
        
        
Add a picture so I can tell you
        
                    
             
        
        
        
These viruses – known as phages – attach to the surface of bacterial cells, inject their genetic material, and use the cells' enzymes to multiply while destroying their hosts. To defend against a phage attack, bacteria have evolved a variety of immune systems
 
        
                    
             
        
        
        
the answer is D.he conversion of restaurant grease to bio-diesel fuel for use by motorists.