More than 200 million people in the world are at great risk because they live near cities less than two meters above sea level, which put them at risk of sea level rise and drowning.
A study showed that by 2100, the number of people at risk of sea-level rise could rise to 410 million, most of whom will be in regions of which 62% are in tropical latitudes.
The study covered selected countries, with a population of more than 25 million people in 2010, who live on lands below high tide lines.
China ranks first in terms of the most at risk, followed by India, Bangladesh, Vietnam, Indonesia, Japan, the Philippines, Egypt, the United States of America, Burma, Nigeria, Malaysia, Britain, Mexico, South Korea, Pakistan, Iraq and Italy.
Earlier, British Prime Minister Boris Johnson warned, in a speech during the United Nations climate conference in Glasgow, that 3 cities, Miami, Alexandria and Shanghai, would disappear if measures were not taken to prevent a rise in global temperatures.
Johnson said: “4 degrees and say goodbye to entire cities, Miami, Alexandria, Shanghai, they will all be lost under the waves of the sea.