Chinanews, Shanghai, April 4 - Global warming might mean a lot more to cities near sea coasts or river banks like Shanghai and London than to inland cities, for they might be submerged by the flood due to the rising sea-level. Recently, a Sino-British research program on the possible flood in the Taihu Lake basin was launched, with Shanghai as its focus.British researchers have already noticed Shanghai's risk of being submerged by flood in the future, for it is one of the most endangered cities in the world."If we don't take measures to stop emission of greenhouse gases, the average temperature in the world might rise by 2 degrees by 2050, then the coastal cities might be submerged under the rising seas," said Paul Brown, the chief editor of the environmental column of the Guardian, "Though the speed might be slower than the extreme result by computers, we have to be aware of the danger, " Paul warned.