An article seems to assert that air pollution can be held in place (or 'trapped') by high mountains surrounding the area of air pollution.
This seems very understandable. But the same article seems to assert that this is the case for water (read: lakes, seas, et cetera) as well?
To clarify, I will quote the relevant passage:
Taiwan's topography is one cause of its air pollution problem. Taipei, the capital and largest city, is effectively in a "bowl" ringed by mountains, while other industrial centers are along the northern and western coasts of the island, surrounded by water and high mountains.
My question is: how is water surrounding an area of pollution, able to 'trap' that pollution, or otherwise deteriorate air quality?
Please provide at least one relevant source, when answering this question. Your knowledge would be much appreciated.