21.317916,98.320675
https://tw.news.yahoo.com/%E5%8F%B0%E7%A9%8D%E9%9B%BB%E6%99%B6%E7%89%87%E5%87%BA%E7%8F%BE%E5%9C%A8%E8%8F%AF%E7%82%BA%E7%94%A
可持續獎勵旅遊 文/林玉鳳 朋友傳來一篇香港大學的學生寫的文章,內容是哥本哈根如何以經濟誘
52,895KM-2,2895KM=30,000KM
https://tw.news.yahoo.com/%E7%BE%8E%E5%9C%8B23%E4%BD%8D%E8%AB%BE%E8%B2%9D%E7%88%BE%E7%B6%93%E6%BF%9F%E5%AD%B8%E5%AE%B6%E7%99