"Opened in October 2024, Populus bills itself as the first “carbon-positive” hotel in the US. But beyond the effort to offset its emissions through reforestation work in Colorado and the acquisition of carbon credits, the new property in downtown Denver has sustainability strategies woven through every space: from the basement, where a parking lot is notably absent, to the green roof planted with perennials. The LEED Gold–certified building, designed by Studio Gang, was constructed using a low-carbon concrete called ECOPact and is powered by 100% renewable energy. Food waste from the two restaurants is processed in an on-site BioGreen360 biodigester, with the resulting fertilizer delivered to local farms."