Every city is faced with a different a unique air pollution problem of its own. Some cities, such as Beijing and Athens have, in general, considerably higher air pollution levels compared to cities such as Montreal or Dublin.
There is no denying the fact that air pollution is an extremely serious problem: the city authorities should take strong measures to deal with it.
Pollution is still a serious problem, not that we don't have the ability to solve it, but that
some people have not realized the consequences of the problem.
