How safe is stream water?

How can negative effects of tourism be overcome? What zoo animal is most likely to injury a zoo keeper? What stated that colonial settlers had to remain east of the appalachians? How does the desert ironwood adapt to the desert? What might cause any type of well to run dry? What is the price of admission to the Royal Melbourne Zoo? How long is the Orinoco river? Which ocean lies west of Europe? What is the area between Red Sea and Persian Gulf? Where is Hamburg Danube River Bonn Black Forest? What is China wall? How many seven and a half inch pencils would have to be placed end to end to reach from ground to the top of the tv mast on the Eiffel tower? What does a coral reef do? What did Erik weihenmayer use to climb Mount Everest? Who discovered gold in the Rocky Mountains? What are the advantages of piecework? Where is mount McKinley on a map? Wollen wir Freunde sein? What is a desert gully called? What were some special challenges that the architects and engineers face building the golden gate bridge?