how....
回答 (1)
2007-03-18 7:28 pm
✔ 最佳答案
um..plant more trees...save energy, electrincity...
take more public transport...
use solar energy instead of gas or other resources
etc...
參考: myself
收錄日期: 2021-04-13 13:38:44
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070318000051KK01221