Lesson 3 > 1. a) In pairs, look at the examples below and complete the gaps in the table. variety of The relationship between two situations can be shown in a ways: Ove is (1) iss (3) fo it EFFECT: CAUSE: water pollution oil spills Oil spills cause water pollution. Oil spills lead to water pollution. Oil spills result in water pollution. Oil spills produce water pollution. CAUSE: EFFECT: oil spills water pollution Water pollution is caused by oil spills. Water pollution is produced by oil spills. Water pollution results from