The main conclusions are as follows: In the time evolution of the GDI, the HCUA shows an overall trend of first rising, then falling, and then rising again, and is at an average level of green development, increasing from 0.358 in 2010 to 0.379 in 2020.
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Assessment of spatio-temporal evolution trends and driving factors of green development in Harbin-Changchun urban agglomeration.
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The sentences
In terms of stages, the GDI showed a trend of rising and then falling in 2010–2012, which was due to the increased investment in infrastructure construction of industrial development.