What are some of the positive impacts on the Sahara made by man?

What term describes the area around the mouth of a river where fresh water and salty water mix? Why couldn't the Yangtze river dolphin move to a better home? How does pi try to lift spirits while lost at sea? How do you move the barrier? Why are catfish and carp found at the mouth of a river while trout are found nearer to the source? H0w are chameleons adapted to the rainforest? When was ross castle in cleethorpes made? What are the names of the waterfalls in Egypt? How did mountains and deserts affect china's civilization? What are the goals of the state from among the youth in nation building? How do you find the code to the lighthouse in Deception Island? How deep is the ocaen? If a ball was dropped from the Empire State Building or from the Golden Gate Bridge or from the Statue of Liberty and from the top of a table tell Gravitation how long it would take each of the balls? What is a group of forests? How does a sea wall affect sea animals? What are oil products used for? What two plates collided to form the rocky mountains? What is a mongolian tent called? What do girls in Australia wear on the beach? What are the legends of the Great Wall of China?