The GDP of Angren County has had an increasing trend, increasing from 98 million CNY in 2000 to 1.3 billion CNY in 2021 ( Fig. 2 d).
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Effects of climate warming and declining water quality on the eco-environmental evolution of Jinmucuo Lake: Evidence from sedimentary diatom assemblages.
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The TP concentration had a decreasing trend from 1876–1963 (mean of 664 ppm), and a fluctuating increasing trend from 1963 to 2023 (mean of 698 ppm); then, the growth rate increased significantly in 1996 and reached 700 ppm after 2000 ( Fig. 6 ).