????:1???????:???????

2?????????????

3??????92??95??

4?????????

5?????????

?10??????????????????8????? ?????8????????????????,?????????,?????????????58%,?????????????,???????????????????????????

???????????,?????«Wetlands»????????,?????1??????????3?????????????:1920??????????????????????????1950????????????????????,???;?????????????1950????????????,??;??2010?,?????58%??????????

?,??????,?????????????????,??;???,?????????????,?????,??????

??????????,????????????????????????????,?,?????????????????????,?????????????

??????????,???,??????????1984????????????2016?16%?20??????????????????,??,???????????,???

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