Put the verbs in brackets into the correct tense. 1)if )their cars less,there would be fewer traffic jams. 2)if were you,) organic food more often. 3)when ) waste,it causes air pollution. 4)if )paper,you will help a lot. 5)if everyone drove an electric car,) less polluted.

1)If people.(used)their cars less,there would be fewer traffic jams.
2)If were you, I would (eat) organic food more often.
3)When you(burn) waste,it causes air pollution.
4)If you (recycle)paper,you will help a lot.
5)If everyone drove an electric car, cities would (be) less polluted.