Top 10 megacities facing a water crisis
Cities ranked by seriousness of water crisis. Bars show population in millions
1 Chengdu, China
2 Lagos, Nigeria
3 Seoul, South Korea
4 Paris, France
5 Rio de Janeiro, Brazil
6 Dhaka, Bangladesh
7 Mumbai, India
8 Sao Paulo, Brazil
9 Chennai, India
10 Shenzhen, China
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