The document discusses building energy use and efficiency opportunities in Saskatoon, Saskatchewan. It shows that 58% of the city's carbon emissions come from buildings, with most from space heating. A Passivhaus building can reduce annual space heating costs by over 75% compared to average homes through superior insulation (R60 walls) and an ultra-tight building envelope. While Passivhaus construction costs about 8% more up front, the long-term energy savings outweigh the additional costs through lower utility bills. The document advocates for policies to support green building practices like Passivhaus in Saskatchewan.