What is the water cycle?
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Where is freshwater on Earth found?

What products need water in order to be produced?

What is a watershed?

What is runoff?

What is point & non-point pollution?

How do land uses affect water quality?

How can we protect the water quality of rivers, lakes and streams?

How can groundwater become contaminated?

What is permeability & porosity?

How can you determine the health of a river?