Green roofs are but one of the tools in the low-impact design and sustainable architecture tool box.   No other single tool provides the vast benefits that a green or vegetated roof can provide.  Among these are: 

• reduced energy use,
• reduced and filtered storm water run-off,
• reduced urban heat island,
• reduced land fill as a green roof extends the life of the roof,
• improved air quality
• a more biodiverse environment,
• more beauty,
• a safe and friendly place for bees and birds
• more efficient solar panels. and
• a possible edible garden.