pollutants, harmful substances that make air, water, or land dirty, ocean pollution, the condition when harmful materials enter and damage the ocean, runoff, water that flows over land and carries dirt, chemicals, or waste into rivers or oceans, nonpoint source pollution, pollution that comes from many different places, not one clear source, point source pollution, pollution that comes from one clear source, such as an oil spill or factory discharge, marine debris, trash or waste found in the ocean or other water areas, microplastics, very tiny pieces of plastic, usually smaller than 5 mm, fishing gear, tools used for fishing, such as nets, lines, or traps, abandoned vessels, boats or ships that are left behind and no longer used, nutrients, substances needed by plants or organisms to grow, such as nitrogen and phosphorus, nitrogen, a nutrient that helps plants grow, but can pollute water if there is too much of it, phosphorus, a nutrient that supports plant growth, but can cause pollution when excessive, algal blooms, a rapid growth of algae in water, often caused by too many nutrients, decompose, to break down or decay naturally, oxygen, a gas needed by many living things to survive, global problem, a problem that affects many countries or the whole world

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