option out of no option, choice is about relativity

来源: 于 2011-03-12 04:05:01 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

nuclear energy is well recognise 'clean' energy beside solar energy（light and wind);

hydrolic is widely accepted a none clean energy due to the intangible cost to enviroment...