More than 600 million people (around 10 per cent of the world’s population) live in coastal areas that are less than 10 meters above sea level.
Nearly 2.4 billion people (about 40 per cent of the world’s population) live within 100 km (60 miles) of the coast.
http://www.un.org/sustainabledevelop...et-package.pdf
https://www.sciencedaily.com/release...0626105746.htm