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April 12, 2004

Letter to the Editor: Don't overestimate benefits of eco-roofs

Green is good. The low impact development solutions to our stormwater problems improve the environment and lower the cost of stormwater mitigation. Innovative greenwater facilities such as eco/green-roofs, rain gardens, bioretention, permeable pavement, amended soils and other solutions are the future of stormwater management.

However, we have a problem. We are making unrealistic and unsubstantiated claims about the effectiveness of these facilities. For example, some claim that eco-roofs reduce stormwater runoff by 50 percent. That sounds great, but it is not physically possible.

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