Plants clean our air and water.

Meaning: This sentence is talking about how plants help to clean our air and water.

Choice of Words: Plants are living things that grow in soil or water. Clean means to make something free from dirt or impurities. Air is the mixture of gases that surrounds the Earth. Water is a clear liquid that covers much of the Earth's surface. When you put them together, it means living things that grow in soil or water make the mixture of gases that surrounds the Earth and the clear liquid that covers much of the Earth's surface free from dirt or impurities.

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