* Supply each blank with one suitable word. Our oceans are becoming extremely polluted. Most of this pollution comes from the land, which means it comes from people. Firstly, there is (01) …………………sewage, which is pumped directly into the sea. Many countries, both developed and developing, are guilty of doing this. Secondly, ships (02)…………………about 6 million tons of garbage into the sea each year. Thirdly, there are oil (03)…………………from ships. A ship has an accident and oil leaks from the vessel. This not only pollutes the water, but it also kills (04) …………………life. Next, there are waste materials from factories. Without proper regulations, factory owners let the waste run directly into the rivers, which then leads to the sea. And finally, oil is washed from land. This can be the result of carelessness or a deliberate (05) …………………of waste.