What is the most important use of water in your daily life?

Which of these could cause excess nutrients to enter a river or lake?

A pollutant that enters a body of water from a known source is a point-source pollutant

A pollutant is the amount of a substance that is in another substance.

Which of these would be used to treat the wastewater in a large city?

Which of these is a good way to conserve water at home?

Why are freshwater shortages a global problem?

Which of these can cause water shortages anywhere on Earth?

Which of these is the best example of balancing water needs and conservation?

What are two possible solutions to shortages of fresh water?

Why is water so important to life on Earth?

Which of these would be the most effective way for a farmer to produce food for the global population yet still conserve water?

What is the purpose of using sand, gravel, and chlorine during drinking water treatment?

Which of these would be the most practical method for treating the water used at a large rural school?

What causes most pollution of fresh water?

What condition exists during a drought?

How do countries limit the pollution of fresh water?

About how much of Earth's surface is covered by water?

Where does fresh water exist on Earth's surface?

Why are aquifers important?

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