Assertion: ozone's concentration | /r/CapableOf | have stabilized in recent years
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text: Although the concentration of HCFC-22, the most abundant HCFC, continues to increase in the background atmosphere (see figure and data at ftp://ftp.cmdl.noaa.gov/hats/hcfcs/), the concentration of HCFC-141b and HCFC-142b appear to have stabilized in recent years, likely because reported production of HCFCs summed together peaked recently and is scheduled for a complete phase-out by 2030.