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How Hanoi deals with wastewater
By
Tien Thanh, Hoang Phuong, Vo Hai, Ba Do
 November 21, 2019 | 07:57 am GMT+7
Only 22 percent of wastewater in Hanoi is treated, with the rest dumped directly into rivers and lakes.
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infographic
Hanoi
wastewater
rivers
lakes
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environment
pollution
water treatment
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