How long does it take to clean a ocean?

Where is the Rainbow Beach located? What percent of the redwood trees were cut down? Length of the river Zaire in miles? What are the differences and similarities between the Ohio and Missouri river? Is Maui in the Pacific Ocean? Why they build The Great Wall of China? Why should people care about the rainforest? How many kilometers long is the river Congo? Where can the Dasht-E-Lut desert can be found? What parts of London can you see the river thames? How much does the Eiffel Tower weigh? Do dentists remove the root of a tooth when a root canal is performed? How much of the world is covered by sea? Where is the rocky mountains located? Is Lake Isabella the largest private lake in Michigan? How many stars does the statue of liberty have? Is friction reduced when a canoe glides down a river? What was the first ride at cedar point? How deep is the Goulburn river? What country serves as a passage between the Atlantic and pacific with out having to circumnavigate south America?