Quantitative attribution of spatio-temporal pattern of pm2.5 concentration based on geodetector and GWR model: Evidence from China's three major urban agglomerations.

The concentration of PM2.5 shows an overall trend of fluctuating decline The variation range of PM2.5 concentration in the three urban agglomerations is significantly different, and the average annual concentration from 2005 to 2020 shows a fluctuating downward trend ( Fig 2 ), ( Fig 3 ).

also in 4,871 other papers

The impact of urban expansion (X8) showed a trend of spreading from PRD to BTH, suggesting that under the support of natural geographical conditions, the cities in BTH are more conducive to enhancing the pollution reduction effect through the expansion of built-up areas than those in PRD, while the effect on BJH is not significant.

also in 53,322 other papers