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The 
 compared New York City to Venice and Jakarta. Venice is experiencing more 
 despite its new $5.3 billion 
 of sea walls. Indonesia is building a new 
 city from 
 because Jakarta is sinking. The United Nations forecast that 70 per cent of the world's 
 will live in cities by 2050. Dr Parsons said: "When you build a 
 and it gets full of people, you end up with 
." He said New York was 
 of a place where many people move to and then has a high 
 of new buildings.