Question
1. How much of the total water at earth's surface is fresh water?
2. Of all the freshwater at the earth's surface, what percent is found as ice and glaciers?
3. What percent of all freshwater is groundwater?
4. What percent of the rainfall that falls on continents is returned to the oceans as runoff? What percent evaporates?
http://static.teriin.org/teriscope/resupdates/oasis.htm
2. Of all the freshwater at the earth's surface, what percent is found as ice and glaciers?
3. What percent of all freshwater is groundwater?
4. What percent of the rainfall that falls on continents is returned to the oceans as runoff? What percent evaporates?
http://static.teriin.org/teriscope/resupdates/oasis.htm