Complete the text. Use the correct second conditional form of the verbs in brackets. Many scientists are worried about global warming. The consequences could be serious. If all the ice in the Arctic and Antarctic regions 1 (melt), sea levels 2 (rise) and cause terrible floods. If sea levels 3 (rise), people living in coastal areas 4 (lose) their homes. The melting ice would also affect the temperature of the sea. If the sea 5 (get) colder, the northern half of the world 6 (freeze). There would be terrible snow storms and millions of people 7 (die).