Barely Significant

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As far as the impulse response of lnSI to 1 unit of lnCOD is concerned, all values are positive and display an increasing trend except for during the first three periods, suggesting that COD discharge would impose a negative impact on industrial structure adjustment in the short term, although this effect could be reversed in the long term.
The results show that the annual average CO 2 concentration showed an increasing trend (growth rate: 1.90 ppm year −1 ), ranging from 389.80 to 410.43 ppm, and the annual average CO concentration also showed an increasing trend (growth rate: 1.78 ppb year −1 ), ranging from 136.30 to 189.82 ppb.