Impact of urban development on natural comfort of human living environment in Beijing-Tianjin-Hebei region

Multi-source remote sensing data were used to construct a comprehensive evaluation model for natural environment comfort of urban living, with principal component analysis． This model was applied to the Beijing-Tianjin-Hebei region, to evaluate changes in natural environment comfort in 2000, 2010 and 2020, under the background of urban development． The overall comfort level of urban residents in the region improved gradually, starting from the city center to the city periphery, with an average increase of about 10%． Compared with 2000, the comfort level in 2020 improved, the total number of high-comfort districts and counties nearly doubled in 2020． Changes in comfort level in typical cities are generally consistent with the overall trend, but differences are noted in the speed of improvements．