TEST YOUR KNOWLEDGE! HOW WELL HAVE YOU READ THIS SECTION? True and False Quiz True False 1. 97% of the earth's water is salt water     2. Most of the earth's fresh water lies below the surface of the earth.     3. In the earlier days before chemicals and technology watercourses were well looked after     4. Cleaning all the logs and debris out of a stream is a good idea     5. The main source of chemicals in our watercourses comes from forestry operations     6. Canada has one of the best records worldwide for its treatment of municipal sewage.     7. Farmers should plough up to the edge of a stream because the manure from the field will help fish.     8. Chemicals and detergents coming from our toilets and household drains can seriously pollute water supplies.     9. Acid rain is one of the serious problems facing watercourses in Nova Scotia.     10. Purple loosestrife should be dug up and burned if it is found.