加拿大的油砂刚开始的时候经济价值也很高。水污染也是在规模扩大后才提上日程。

来源: sweetptt 于 2016-10-03 17:29:04 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.