That looks fresh compared to what I've seen in Beijing - and that was still "fresh" compared to what I saw around one of the power plants while taking a train through China.
Though, to be fair, the Beijing haze is partially natural, some of the visibility problems is caused from particles coming from the deserts.
Air pollution is a much worse disaster and much bigger killer than all terrorism combined, but since it comes so slowly and gradually it doesn't get the attention it deserves.
RE: Bad air in Taipei