Over the past 50 years, six Nile Basin countries have built 25 hydroelectric dams.
 
        
                    
             
        
        
        
The flooding of New Orleans during Hurricane Katrina was a human-made disaster, not a natural one. The flood-protection system for the city had been poorly designed and maintained. ... Without the levees and floodwalls, much of the city would be a shallow lake.
        
             
        
        
        
Answer:
answer from google
Explanation:
Because this is the phase in which the moon passes between the earth and the sun and therefore cannot be seen. ... the moon is always rotating on its axis; the time it takes to rotate once is exactly the same length of time it takes for the moon to orbit the earth. We always see the same side of the moon, the near side.