CHEM H90 Lecture Notes - Lecture 16: Polar Stratospheric Cloud, Ozone Depletion, Haloalkane
Document Summary
The ozone hole and the man who saved the planet (pt. 2) Antarctic ozone readings: this is the full curve of the british antarctic readings, from 1980, a sudden drop, from about 200 to below 100 since 1990. Largest ever antarctic o3 hole: ozone depletion, the ozone hole, is the area on the surface of the earth where ozone is seriously missing. Changing size of o3 hole: a function of month, as you go from august to december, you see the ozone hole appear and disappear. Industry"s response: let"s fi(cid:374)d a (cid:449)a(cid:455) to (cid:374)ot (cid:449)orr(cid:455) a(cid:271)out the pro(cid:271)le(cid:373, the(cid:455) do(cid:374)"t reall(cid:455) (cid:449)a(cid:374)t to k(cid:374)o(cid:449) (cid:271)e(cid:272)ause it"s (cid:374)ot good for (cid:271)usi(cid:374)ess. Cfc production: thirteen years later, 1987, the montreal protocol was signed. In the mid 1970s, energy crisis occurred: lots of our chemicals come from cracking oil, cfc production leveled off. I(cid:374) (cid:1005)(cid:1013)(cid:1012)(cid:1011), the (cid:449)hole (cid:449)orld sig(cid:374)s a treat(cid:455) sa(cid:455)i(cid:374)g the(cid:455)"ll stop produ(cid:272)i(cid:374)g cfc: cfc production goes way down.
