Wildfires have increased in frequency and severity over the past few decades. More fires are burning at the wildland-urban interface (WUI), where homes and other buildings meet the natural landscape—but our understanding of emissions from structure fires is still growing. New research led by the University of Colorado Boulder’s Cooperative Institute for Research in Environmental Sciences shows that common synthetic materials used in homes, like plastics and insulation, can release harmful compounds into the air when they burn. But synthetic materials make up only a small fraction of a home. Timber and wood panels make up the majority of the materials used, and the burning emissions from those are not so different from a vegetation fire. The work, published in Environmental Science & Technology, identifies compounds that are enhanced in smoke from a house fire. …The team’s work highlights the complexity of fire emission research… needed to better understand emissions from structure fires at the WUI.