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1979- Radiative forcing - climate change - global warming - EPA NOAA.svg
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Warming influence of greenhouse gases
Watts per square meter
Annual greenhouse gas index
4.0
3.0
2.0
1.0
0
1.5
1.0
(1990)
0.5
0
1980
1990
2000
2010
2020
HFCs
(HFC-134a, HFC-23, HFC-125, HFC-143a, HFC-32, HFC-152a, HFC-227ea, and HFC-365mfc)
HCFCs
(HCFC-22, HCFC-141b, and HCFC-142b)
CFCs
(+ CCl4, CH3CCl3, Halons)
Nitrous oxide
Methane
Carbon dioxide
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