Silly English rule alert: "Earth" is capitalized as a proper noun, usually indicated by omitting the direct article. "The first three planets are Mercury, Venus and Earth," or, "The aliens first encountered Earth in their flying saucer." It is not capitalized in most other forms, usually indicated by using the direct article. This also includes when using the word "earth" to mean "land" or "soil." "The earth revolves around the sun in just over 365 days," or in your case, "Pollution taints the air, the water and the earth."

Pollution taints the air, the water and the Earth. Additionally it pushes wildlife species away from their natural territory making their alimentary resources decrease in quality and quantity. Good Job, Very Close! I revised the paragraph above for you.