Underline the right option.
The planet’s water reserves are constantly polluted by waste from agriculture, industries, and (1) sewage / sewers / sewing. Since water is always circulating through the environment, it transports the (2) pollution / polluted / pollutants it contains from one area to the next. A pesticide that is (3) sprayed / spread / crowded on a field, for example, seeps into the groundwater, finds its way to a stream, and finally (4) ends up / gives up / comes up in the ocean. These toxic substances harm (5) poisonous / aquatic / dead plants and animals, and also infect the food Chain, causing certain plant and animal species to become (6) extinct / extinction / extincted. They can also (7) effect / defect / affect humans who eat fish. Even though (8) dumping / collecting / clearing garbage in the ocean is strictly forbidden, many countries release their (9) treated / untreated / treatment sewer waste and dispose of their garbage into the water. In addition to this, more than 6 million tons of oil are accidentally (10) spilled / littered / floated into the ocean every year.