5 Questions
What percentage of the earth's water is fresh water?
75%
Which of the following is the largest source of fresh water for human use?
Groundwater
What percentage of the earth's water is salt water?
75%
What is the primary cause of contamination of drinking water mentioned in the text?
Biological sources
Where is the majority of the fresh water on earth located?
In polar ice-caps and glaciers
Test your knowledge about water contamination and its impact on human health in this quiz. Learn about the sources of water pollution and ways to ensure safe and clean drinking water for everyone.
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