National Geographic

$WDQDQQXDOIHVWLYDOLQ;X\L&RXQW\northwest of Shanghai, 10,000SHRSOHGLQHRQWKHDUHDŠVVSHFLDOW\FUD\ƃVK7KHWKULYLQJLQGXVWU\UDLVHVan estimated 100,000 tons of theVKHOOƃVKD\HDULQORFDOODNHV