1) The Earth wouldn’t be in danger if people________ (be) careful,  a) were b) are c) would be d) will be 2) If the air in the city________ (get) polluted, it can make people sick. a) gets b) get c) will get d) got 3) There ________ (be) less air pollution if people didn't use cars ,  a) will be b) is c) are d) would be e) would not be 4) If we use public transport more, we________ (reduce) air pollution. a) reduce b) reduces c) will reduce d) would reduce 5) What (happen) ________ if water pollution stopped? a) will happen b) happens c) happen d) would happen 6) If we dump poison into rivers, we ________ swim in them in the future. a) would not b) are not c) can   d) can not 7) You________ (not be) able to see stars at night if light pollution ________ (keep) growing, a) will not be / keeps b) would not be / kept c) are not / will keep d) were not / would keep 8) If there ________ (be) no more pollution, the world ________ (be) a better place? a) is / will be b) was / would be c) is / will the world be d) was / would the world be

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