Waste to energy conversion for a sustainable future.

Heliyon · 2021 · PMC8545696 · PMID 34729426

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a decreasing trendno p-value reported

Although the global ban on CFCs has led to a decreasing trend of CFC-12 and CFC-11 gases, their concentrations in air are still more than HCFC-22 and HFC-134a ( NOAA, 2019 ).

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