4th Conference HANGZHOU'90
| Venue | Hangzhou City, China |
|---|---|
| Date | 5-9, September, 1990 |
| Main Host | Min. of Environmental Protection |
| Co-Hosts | Academy of Environmental Science, ILEC |
| Supporting Agencies | UNEP, UNCRD, IWRA, IAWPRC,Chinese Foundation on Natural Science,SIL, Shiga Prefecture |
| No. of Participants | 422(31 countries) |
| Main Theme | Eutrophication of lakes |
| Registration fee | |
| Symbol Mark |  |
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