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