Is the existing pollution there in that part of China a contributing factor to the disease reported as a result of the coronavirus?

Pollution per se is not a significant factor. This is a distraction intended to minimize the seriousness of the viral origin of the epidemic and delay governmental responses in a meaningful way to quarantine individuals who may have been exposed. That is the only way, at least under normal circumstances, to contain a communicable disease. In this instance, it is doomed to fail because there is an abnormal means for the virus to spread, which is the Mercenary Army Program who has done so already, to seed it in dozens of countries beyond the Chinese border. That is the problem being faced here. When the governments are slow to respond with quarantine measures, it increases the level of ongoing exposure and transmission to increased numbers of infected individuals who through their movements will pass it on to many, many others. Pollution per se is always a degrading influence and affects some more so than others, but by and large is a long-term progressive lowering of resistance and cumulative small degradations of function, and unless there is an unusual release of highly toxic substances because of explosion in a chemical plant or other facility containing poisonous materials, it will not cause acute widespread symptoms.