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MIDDLE SCHOOL

Earth and Space Science

Earth and Human Activity

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Earth and Human Activity: Earth’s Water Systems

Protecting Water From Pollution - I

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Protecting Water From Pollution - I

Protecting the water supply means making sure that clean, safe water is available for people, plants, animals, and ecosystems. Water moves through Earth’s systems as part of the water cycle, and it can become polluted or overused. Because water is limited and ...

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Water is a limited and essential resource. Using too much for farming, factories, or at home can reduce its availability to people. It can also be harmed in serious ways, such as through pollution or overuse.

In the mid-1900s, the Cuyahoga River caught fire several times. It was filled with oil and industrial waste that made it flammable. ...

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