People pollute the oceans by throwing garbage on the beach or into the water. Garbage harms plants and animals in the oceans. Factories pollute the oceans by dumping chemicals into the water. Like garbage, chemicals harm plants and animals. Farmers pollute the oceans by using chemicals to kill insects. Farmers also pollute the oceans by using these to help make plants grow. The chemicals get into waterways and run into the oceans. The chemicals help farmers, but they harm ocean animals and plants.