Comment on CFCs

dangblingus@lemmy.dbzer0.com ⁨8⁩ ⁨months⁩ ago

• Theharpyeagle@lemmy.world ⁨8⁩ ⁨months⁩ ago

  Is this true? An article from 2022 indicates things are getting better, just slowly

  Today, the ozone hole still exists, forming every year over Antarctica in the spring. It closes up again over the summer as stratospheric air from lower latitudes is mixed in, patching it up until the following spring when the cycle begins again. But there’s evidence it’s starting to disappear – and recover more or less as expected, says Solomon. Based on scientific assessments, the ozone layer is expected to return to pre-1980 levels around the middle of the century. Healing is slow because of the long lifespan of ozone-depleting molecules. Some persist in the atmosphere for 50 to 150 years before decaying.

  bbc.com/…/20220321-what-happened-to-the-worlds-oz…

  source

  • SoleInvictus@lemmy.world ⁨8⁩ ⁨months⁩ ago

    It’s not. I’m guessing they did a Google search, looked at a few misleading article titles, and then decided they were a scientist.

    On average, the hole has been shrinking, but 2023’s hole was the 12th biggest on record. The eruption of Hunga-Tonga was thought to be the main factor.

    source
• Aleric@lemmy.world ⁨8⁩ ⁨months⁩ ago

  Citation: Rectally Sourced Science.

  source

  • dangblingus@lemmy.dbzer0.com ⁨8⁩ ⁨months⁩ ago

    Here you go: earthobservatory.nasa.gov/world-of-change/Ozone

    source

    • Theharpyeagle@lemmy.world ⁨8⁩ ⁨months⁩ ago

      Models suggest that the concentration of chlorine and other ozone-depleting substances in the stratosphere will not return to pre-1980 levels until the middle decades of the 21st century. Scientists have already seen the first definitive proof of ozone recovery, observing a 20 percent decrease in ozone depletion during the winter months from 2005 to 2016. In 2019, abnormal weather patterns in the upper atmosphere over Antarctica dramatically limited ozone depletion, leading to the smallest hole since 1982. Models predict that the Antarctic ozone layer will mostly recover by 2040.

      source
• cobra89@beehaw.org ⁨8⁩ ⁨months⁩ ago

  We definitely did something. It just would have been a lot worse if we didn’t. In fact so bad that BBC says the planet would have been “uninhabitable.”

  According to some models, the Montreal Protocol and its amendments have helped prevent up to two million cases of skin cancer yearly and avoided millions of cataract cases worldwide.

  Had the world not banned CFCs, we would now find ourselves nearing massive ozone depletion. “By 2050, it’s pretty well-established we would have had ozone hole-like conditions over the whole planet, and the planet would have become uninhabitable,” says Solomon.

  bbc.com/…/20220321-what-happened-to-the-worlds-oz…

  source