Toronto Mayor David Miller discusses the origins of his environmental passion and his sense of social justice. Chris Chopik interviews Mayor Miller during the first Cities Alive, the World Green Roof Infrastructure Congress in Toronto.

Toronto's unique Green Roof bylaw will have a positive effect on the quality of life of Torontonians, relating to air quality, storm water management and urban heat island effect.

Property owners will benefit from a longer roof life expectancy compared with contemporary bitumen products, in addition to building performance gains. The integration of Ontario's Green Energy Act, with Solar PV and the already-proven Solar Thermal technologies make the industrial roof renovation one of the most interesting green building marketplaces in Toronto and other Ontario markets.