Nature has a nice News Feature on how humans first caused an ozone hole in the atmosphere, then banded together to fix it. Really pretty inspiring what we can do when we need to. (The scientific story is also interesting.) And a lesson to how we can work together to solve the specter of global climate change and global weirding.
The images on the left show a computer model of what the ozone hole (blue) would have looked like if we had done nothing; the ones on the right are what we’ve (probably) done by eliminating CFCs from the atmosphere. The large ozone hole would have been seriously catastrophic: Living in NYC or Tokyo would mean getting dangerous sunburns in 5 minutes of sun exposure. Ouch.
I think the ozone hole offers two lessons. (1) That climate science is not BS. And (2) that humans can cause and solve global atmospheric problems. The first probably won’t convince any global-warming skeptic, because they could claim that it was the same faulty science then as now, and that there never was a ozone hole.
But the second lesson should inspire all but the most adamant doubters. Humans are powerful enough to dramatically alter Earth’s environment, sometimes in catastrophic ways. Moreover, we can collaborate internationally to solve global problems. Why are we not inspired to slow global weirding (and solve other international problems such as abject poverty)?