1) If we cut down trees, a) forests would disappear. b) forests will disappear. c) forests have disappeared. 2) If we don´t do something now, a) global warming will get worse. b) global warming would get worse. c) global warming has got worse. 3) If people continue hunting animals,  a) some species have disappeared. b) some species will disappear. c) some species would disappear. 4) If people recycle their rubbish, a) cities wouldn´t be polluted. b) cities have been polluted. c) cities will not be polluted. 5) If sea animals eat plastic, a) they will die. b) they have died. c) they would die. 6) If people throw away rubbish in the street, a) cities will be polluted. b) cities would be polluted. c) cities have been polluted.

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