Is Technological Progress Selective for Multiple Pollutant Emissions?

Int J Environ Res Public Health · 2021 · PMC8431310 · PMID 34501874

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a decreasing trendno p-value reported

From Figure 4 , it can be seen that CO 2 is still on a rising trend year by year, SO 2 is on a decreasing trend in general, PM 2.5 is on a rising trend first and then on a decreasing trend, and the inflection point of SO 2 is later than the inflection point of PM 2.5 .

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an increasing trendno p-value reported

In contrast, CO 2 still shows an increasing trend, indicating that fossil combustion is still the main energy supply system in these regions.

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