Porous pavement, which allows water to percolate through instead of run off, is being tried in parking lots [see illustration, far right].

• 这种设计在欧洲相当普遍，在美国的透水性路面也逐渐风行起来，这种路面可让水份渗透，而不是让水流走，目前已有许多停车场开始试用（见最右图）。