Water Pollution & Treatment. Science 8 Chapter 2C NCSCOS 3.07. Warm-Up : copy each sentence with the correct response. The 3 classes of indicators are \_\_\_\_, biological, and chemical. Nitrates from fertilizers found in a water supply are \_\_\_\_\_\_\_\_\_.
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A pollutantis any substance or form of energy that can cause harm to the environment and make it unfit for organisms.
Two types of water pollution: