Bergensis t1_iue1t1c wrote on October 30, 2022 at 4:59 PM

Reply to comment by NessyComeHome in Ozone Hole Continues Shrinking in 2022, NASA and NOAA Scientists Say | Annual Antarctic ozone hole over the South Pole was slightly smaller than last year and generally continued the overall shrinking trend of recent years. by yourSAS

> Phase out started in 2010 and no new manufacturing as of 2020.

The phase out started much before that. In 1978 the use of CFC as a propellant for aerosol cans was banned in the USA.

> R-22 is being phased out in HVAC. Prices for reclaimed r-22 shot up because there is no new manufacturing of r-22 as of 2020. Hcfc have a lower Ozone Depletion Potential than cfc's, but it isn't a perfect 0, for r-22 it's .05 with a Greenhouse Warming Potential of 1700, where r-134a has an odp of 0 and a gwp of 1300.

I'd like to add that the phase out of R134a in favour of R1234yf in car A/C began in 2012.

NessyComeHome t1_iue2tjw wrote on October 30, 2022 at 5:06 PM

My apologies, I was adding stuff around and meant to say r22 phase out began in 2010 with no new manufacturing of r22 since 2020. I will add a * to make it more clear.

Getting my cert, you learn a lot.. like just how bad cfc's were. If I remember correctly, it was 1 molecule of cfc destroyed 100,000 ozone molecules.