Choose the words from the box to complete the following passage: Many cities have a serious pollution problem. Motor vehicles, factories, and other ... create so much air pollution that it may hang in the air like ... fog

I. Choose the words from the box to complete the following passage: dirty, threatens, wastes, pollution, recycling, products, areas, disposing, sources, garbage
Many cities have a serious pollution problem. Motor vehicles, factories, and other(1)_____create so much air pollution that it may hang in the air like (2)______ fog. Air pollution (3)____the health of the people who live in cities. City (4)______ cause water pollution when they are poured into These wastes kill fish and make some (5)____ unfit for wimming. In addition, many large cities have difficulty (6)______ of their garbage. The amount of (7) ______grows each year, but places to put it are quickly filling up.
Citizens, governments, industries, scientists, and business people must work together to gradually reduce (8) ______For example most cities have introduced (9)______ programs, which cut down on garbage and the space needed to store it. dents separate recyclable products from garbage, and city governments provide drop-off cites or pick up the (10)______ from homes.
II. Use the suggestions to make conditional sentences type 1
1. the sea get warmer
2. the ice at the North and South Poles melt
3. the sea level rise
4. there be floods in many parts of the world
5. many people lose their homes and land