Air pollution levels are up in Iran, leading to

a 24-hour public holiday on Wednesday was announced following warnings by the state meteorology organization about high pollution levels earlier in the week.

Maybe this move is to help preempt demonstrations, as some say, due to pending subsidy reductions. Maybe not. Apparently most of this pollution is due to automobiles, but that could be a smoke screen. Anyway, it sounds a lot like LA, with nearby mountains helping maintain air inversion layers trapping bad air.