Warming may disrupt four-fifths of world's oceans by 2050: study

By Alister DoyleOSLO (Reuters) - Global warming will disrupt four-fifths of the world's oceans by 2050 if greenhouse gas emissions keep rising, threatening fish that are the main source of food for a billion people, scientists said on Tuesday.Curbs on man-made emissions, however, would give marine life more time to adapt to warming conditions or for marine life from algae to cod to shift to cooler waters nearer the poles, they said."By 2050 around four-fifths of the ocean surface will be affecte