都比不上你的嘴巴大

送交者: Amsel 于 2013-12-15, 13:02:28:

回答: 楼的作用不大由学人于 2013-12-15, 12:12:45:

Figure 16. Annual average nitrogen dioxide levels are 60% higher in areas with higher, compared to lower, density of built space

这还是非雾霾（容易扩散）的情况