លុបបំបាត់កន្លែងដើមនៃក្រុមក្លែងបន្លំ លុបចោលការចុះបញ្ជ
https://tw.yahoo.com/home/%E5%8D%B0%E5%B0%BC%E5%B3%87%E9%87%8C%E5%B3%B6-%E9%80%AE%E6%8D%95103%E5%90%8D%E5%A4%96%E5%9C%8B%E4%
290,996KM-44KM=290,952KM
去偷渡守衞不嚴，包容性国家，總之用緩沖......
280,587KM-240KM=280,347KM
