Strengthening the Ontario Building Code is a critical tool for the transition to a cleaner economy and an effective way move towards decarbonization. Given that Ontario’s homes and buildings account for about a quarter of the province’s carbon emissions, updating and improving construction standards is crucial. Ontario’s population is set to grow by 30 per cent over the next 25 years, necessitating enormous improvements in energy efficiency. In essence, we need to change the way we build and renovate buildings and we need to do it quickly to avoid locking in carbon emissions that will saddle us with avoidable emissions and energy costs. To this end, The Atmospheric Fund, together with the Clean Economy Alliance and Environmental Defence, drafted and submitted detailed recommendations to the Ontario government.