标题: serval questions [打印本页] 作者: better 时间: 2013-10-4 14:57 标题: serval questions 1.How much garbage we throw everyday
2. How many people of us can throw garbage the right position?
3.why so many parkland so much garbage?
4.is it bad to us or the rich that so much garbage?
5 What we can do to reduce garbage,let the parkland beautiful like before?