sentence2_structure: Global warming<>will eliminate<>some islands$$$Global warming<>reduce<>the area of others<>because it will raise sea levels$$$it<>will raise<>sea levels
sentence1: Scientists have forecast global temperatures warming by up to four degrees centigrade over the next century, melting polar ice caps, raising sea levels, flooding low lying islands and threatening thousands of species with extinction.
sentence2: Global warming will eliminate some islands and reduce the area of others because it will raise sea levels.
question: How will global warming eliminate some islands and reduce the area of others?