LONDON (AP): For the first time, a scientific study has identified the world's low-lying coastal areas that are vulnerable to global warming and sea-level rise, and urged major cities from New York to Tokyo to wake up to the risk of being swamped by flooding and intense storms if nothing is done.
In all, 634 million people live within such areas - defined as less than 10 meters (33 feet) above sea level - and that number is growing, said the study released Wednesday.
Of the more than 180 countries with populations in the low-elevation coastal zone, about 70 percent have urban areas of more than 5 million people that extend into it, including Tokyo; New York; Mumbai, India; Shanghai, China; Jakarta, Indonesia; and Dhaka, Bangladesh.
Asia is particularly vulnerable and in general poorer nations are most at risk, the peer-reviewed scientific study said.
The study in the journal Environment and Urbanization doesn't say exactly what should be done, but it warns that it won't be cheap and it may involve moving lots of people and building protective engineering structures. And, it adds, countries should consider halting or reducing population growth there.
"Migration away from the zone at risk will be necessary but costly and hard to implement, so coastal settlements will also need to be modified to protect residents," said study co-author Gordon McGranahan of the International Institute for Environment and Development in London.
In a separate matter, the authoritative Intergovernmental Panel on Climate Change next week is expected to alert the world that coastlines already are showing the impact of sea-level rise and global warming and that it's expected to worsen. The IPCC - which will issue a report on how climate change will effect human health, cities, agriculture, industry and different species - is expected to say that about 100 million people each year could be flooded by rising seas by 2080.
"As the effects of climate change become increasingly clear, the location of the coastal settlements most at risk should also become evident," said the article by McGranahan, Deborah Balk of the City University of New York and Bridget Anderson of Columbia University.
No comments:
Post a Comment