New York and London could be underwater within DECADES

New York and London could be underwater within DECADES: Scientists say devastating climate change will take place sooner than thought Most scientists agree that sea levels will rise, but some say it won't happen for centuries. Now, a new study suggests sea levels will increase several feet over the next 50 years. It claims the world's coastal cities, including New York and London, could be underwater by the end of the century. Without a dramatic reduction in greenhouse gas emissions, the global sea level is likely to increase 'several meters over a timescale of 50 to 150 years', the paper states.