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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the aksumite empire was an ancient kingdom located in what is now northern ethiopia from the period of 100 ad to 940 ad. its capital was the city of aksum. the kingdom established itself as one of the 4 great powers at its time, along with persia, rome, and china.

the kingdom was rich in goods like gold, iron, and salt. it established strong commercial ties with the regions governed by rome, egypt, and persia (arabia). aksum was a key location in this commercial network. trade was also facilitated with the introduction of the aksumite currency.