I've set up rainbarrels and infiltration pits to collect thousands of gallons of storm water cascading from my roof.
我设置了雨桶和渗透坑来收集从屋顶倾泻而下的数千加仑雨水。
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Arranged in barrels of concrete or plastic, these biosand water filtration systems (BSFs) remove 95 to 99 percent of the bacteria, viruses, worms and particles contained in rain or surface water.