The factories consumed, not emit the pollutants. But that's just a matter of semantics, either way the factories are indirectly responsible because of it's reliance on the coal plants and the vehicles that transport it's goods. So the pollution is getting worse and worse I totally agree, even if the exact % of the pollution source varies.
However, if one think about it, we are also indirectly reliant on those same pollution-spewing factories. I forgot the exact figure, but CX, KA and HX relies on a big chunk of it's business on those amoral businessmen with interest (and factories) on the mainland. We fly them here and they take ferries from the skypier and go on the various points on the PRD, be it Dongguan, Guangzhou or Zhuhai. Now if we removed those factories, those businessmen will not have a need to fly to PRD or take CX, KA or HX. Pax. traffic will suffer and our jobs won't be so secured then.
So we are, indirectly, abetting and relying on the very same pollution spewing factories we complain about?!! Good grief, or am I losing my mind having worked at CX for too long?