Use the verb in brackets in the correct tense form .Pay attention to the usage of "If" and "When " 1If pollution (to disturb ) the balance in nature all living things (not to live) in harmony 2 If the air and the water are pol...

Use the verb in brackets in the correct tense form .Pay attention to the usage of "If" and "When " 1If pollution (to disturb ) the balance in nature all living things (not to live) in harmony 2 If the air and the water are polluted .Many species of plants and animals (to disappear)