I. Put the verbs in the correct tense What ( happen ) _____________________ if there were no cars in the world ? Soil ( not be ) ___________________ so polluted if the farmers didn’t use much chemical fertilizer. Factories won’t dump waste into rivers if the government ( fine ) __________________ them heavily. If light pollution ( happen ) _______________, animals will change their behavior patterns. We will save thousands of trees if we ( not waste ) ____________________ paper. What would you do if you ( be ) ________________ the president ?. If peope ( care ) __________________ about the environment, they wouldn’t dump waste into the lake. Nick ( not sneeze ) ________________ so much if the air was clean. If the local people drink the contaminated water, they (have)………….. ...........health problems. If there were more trees in this area, the air (be) ………….. ............................fresher. If the sun (shine) …………..............., we will walk to the mountain. If I (be) _________________the presidents, I (remove)________________all the factories out of the city. If people travel to work by bus, there ( be ) ___________________ fewer car fumes. If I were you, I ( look ) ____________________ for a new place to live. She may be late if she ( not hurry ) _____________________