Barely Significant

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Soil potentially toxic element contamination heterogeneity Looking to the element concentrations within the topsoil between 0 and 10 cm depth, it was possible to distinguish two groups of elements: on one hand, As, Cu, Pb, Sb and Zn with concentrations that were significantly different among sites and following a decreasing trend i.e.
Second, since China no longer publishes the total wastewater discharge after 2018, this study adds the statistical analysis of Stage 2 and comparatively analyzes the discharge of pollutants in wastewater in each province between 2018 and 2020, which shows that the COD and total nitrogen emissions in wastewater do not show a decreasing trend, but the wastewater treatment investment shows a decreasing trend.
The results show that: first, as temperature rises reduce the economic growth rate of each agricultural sector, and the areas that are relatively vulnerable (i.e., areas where disposable income of farm households is below the sample mean) are more significantly affected by the negative impact of temperature rise; second, the impact of temperature rise on agricultural economic growth is mainly concentrated in the farming period, while the marginal damage of temperature rise is on a decreasing trend; third, the heterogeneous impact of temperature rise on agricultural economic growth during the agricultural fallow period is also not negligible.