R-2000 is a voluntary energy efficiency standard for new house. Is was developed by the Office of Energy Efficiency of Natural Resources Canada in cooperation with Canadian home-building professionals and the housing industry. It's flexible enough to work for any kind of house, no matter what the design, yet detailed enough to work as effectively in Whitehorse, Yukon Territory, as it does in St. John's, Newfoundland. Not only that, an R-2000 home integrates many energy efficiency features that reduce greenhouse gas emissions that contribute to climate change.