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RELATED: Heroes of the Environment Lee Myung Bak >>
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The Mekong provides food, facilitates trade and generates hydropower. But it is not as mighty as before.
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Saving Seoul
Pollution is ruining the quality of life in much of urban Asia. But Seoul's transformation into a greener city proves the tide can still be turned
FROM THE TIME ARCHIVE
Green Dreams
Time to Get Worried
HK's Bad Air Days
TIME graphic by Dennis Wong; Text by Bryan Walsh
SOURCES: Seoul Development Institute; TIME Research
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