Complete the text with the correct forms of the verbs in brackets. scientists are very worried about the effects of global warming. if the ice in the arctic and antarctic regions (1) melt), sea levels (2) (to rise) and cause severe floods. people who now live in coastal areas ( (to lose) their homes. it (4) / to affect) the temperature of the sea. if the sea (5) get) colder, the northern half of the world (6) freeze). there would be incredible snow storms and millions of people (7) die).