What body of water was fresh water in the 1930s but became salt water in the 1980s due to poor management?

What percent of the earth's surface is covered by water?

What percent of all water on the earth is salt water?

What percent of all the water on earth is fresh water?

What percent of the water on earth is in lakes, rivers, biota, wetlands, groundwater, soil, and the atmosphere?

What are water molecules in the gaseous state that have evaporated from soil and other parts of the earth called?

What is the amount of water available to meet demands called?

What is the degree to which water is pure enough to fulfill the requirements of various uses?

What is water with a salt concentration below 0.1%?

What is water that contains at least 3% salt?

What is a mixture of fresh and salt water?

What is water that contains minerals that cause soap to precipitate and produce a scum or curd in boilers?

What is water that is relatively free of minerals?

What is water that contains one or more impurities?

What is water that has had pollutants removed or is rendered harmless?

What is water from precipitation that runs off land surfaces in surges?

What is the amount of water vapor in the air called?

What is the amount of water vapor as a percentage of what the air can cold at a particular temperature?

Which can hold more water vapor?

What is the upper surface of the ground water called?