In addition, in cities like Berlin and Hamburg that rely primarily on groundwater, the government has stipulated that groundwater may not be disposed of in storm drains. It must be collected and returned to the ground.
此外，柏林、漢堡等百分之百以地下水為主的城市，政府規定只要是來自地下的水，都不准隨意排放到水溝，必須收集起來還給大地。