The contamination (making less pure) of air, water, or soil due to harmful substances, usually as a result of human activities. There are different types of pollution, for example: chemical pollution, light pollution, or noise pollution.
A fish with a flattened diamond-shaped body, and a long, poisonous, barbed spine at the base of it's tail.
A place on the coast where ships can safely anchor because it is protected from rough water, wind, and sea currents.
