Water Quality - Lepp Friesen, Helen
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Pollution includes chemicals from farms, factories, and houses. It may enter the water when it is flushed down drains, dumped into lakes and rivers, or released into the air. Learn more in Water Quality.

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Produktbeschreibung
Pollution includes chemicals from farms, factories, and houses. It may enter the water when it is flushed down drains, dumped into lakes and rivers, or released into the air. Learn more in Water Quality.