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A visually apparent but scientifically untested outcome of landâuse change is homogenization across urban areas, where neighborhoods in different parts of the country have similar patterns of roads, residential lots, commercial areas, and aquatic features. We hypothesize that this homogenization extends to ecological structure and also to ecosystem functions such as carbon dynamics and microclimate, with continentalâscale implications. Further, we suggest that understanding urban homogenization will provide the basis for understanding the impacts of urban landâuse change from local to continental scales. Here, we show how multiâscale, multiâdisciplinary datasets from six metropolitan areas that cover the major climatic regions of the US (Phoenix, AZ; Miami, FL; Baltimore, MD; Boston, MA; MinneapolisâSt Paul, MN; and Los Angeles, CA) can be used to determine how household and neighborhood characteristics correlate with landâmanagement practices, landâcover composition, and landscape structure and ecosystem functions at local, regional, and continental scales.