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→Green Values Stormwater Toolbox (Great lakes, USA)
[http://www.cnt.org/tools/green-values-stormwater-toolbox '''CNT's Toolbox webpage''']
[http://www.cnt.org/tools/green-values-stormwater-toolbox '''CNT's Toolbox webpage''']
[http://https://greenvalues.cnt.org '''CNT's Green Values calculator tool"]
[http://https://greenvalues.cnt.org '''CNT's Green Values calculator tool''']
==United States Environment Protection Agency (USA general)==
==United States Environment Protection Agency (USA general)==