V. Read the passage and check if the statements are T or F according to the passage. Air pollution is a serious problem in many cities. Motor vehicles, factories and other sources create so much air pollution that it may hang in the air like dirty fog. Air pollution threatens the health of the people who live in cities. City wastes cause water pollution when they are poured into the waterways. These wastes kill fish and make some areas unfit for swimming. In addition, many large cities have difficulties in disposing of their garbage. The amount of garbage grows each year, but places to put it are quickly filling up. Citizens, governments, industries, scientists, and business people must work together in different ways to gradually reduce pollution. For example, most cities have introduced recycling programmes. 1. Motor vehicles and factories are among some sources of air pollution. 2.Air pollution doesn't endanger people's health in some cities. 3.Air pollution is the only problem of the environment mentioned in this passage. 4.Garbage disposal is a problem in many large cities. 5.Everyone must cooperate to reduce pollution.