CFCs = chlorofluorocarbons
Cl
x
F
y
C (x+y=4)
Examples:
CFC-11 Cl
3
FC
CFC-12 Cl
2
F
2
C
preIndustrial concentration = 0
Production of CFCs began in 1950s
CFCs and other compounds
HFCs, PFCs, and SF6 Emissions