The terms polluted and contaminated have different meanings when it comes to substances put in the environment by human activity. with respect to these substances, what does polluted mean?

means that the contamination is high enough to cause harm to living organisms.

Explanation:

According to my research on pollution and contamination, I can say that based on the information provided within the question polluted means that the contamination is high enough to cause harm to living organisms. When something is contaminated it has become impure from exposure to a substance that may be poisonous. In other words polluted is a more severe form of contamination.

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uhh idk for sure but i think it makes it difficult to pump the oil through the oil rigs

well, there are a lot of places we get information about earth from. like science classes, websites, books, newspapers, etc.