Retrofit that s***!

Faulty towers - "Typically viewed as "mistakes" from the 1960s and '70s, and largely excluded from urban debates, [high-rise apartments] may in fact represent one of our greatest opportunities for creating a sustainable region... Though efficiencies are gained from reduced land coverage, transit use and so on, exposed floor edges (typically protruding balconies), minimal insulation, single-pane windows, and aging mechanical systems give these buildings an unacceptable environmental impact. A typical 25-storey building contributes 1,000 tonnes of carbon dioxide." [Toronto Star]