For 10 points, name this ultraviolet light-absorbing molecule whose namesake "layer" now has a hole in it.
Like hydrocarbons, this compound has unusually high concentration in photochemical smog in relation to other kinds of smog. Although only about ten percent of the total amount of it in the atmosphere is in the troposphere, it is nevertheless classified as a greenhouse gas. This molecule is broken down in a radical reaction with (*) CFCs. For 10 points, name this ultraviolet light-absorbing molecule whose namesake "layer" now has a hole in it.
Like hydrocarbons, this compound has unusually high concentration in photochemical smog in relation to other kinds of smog.
{ozone} [or {O3}]