Is there something planned for the Pollution-System, like an industrial air filtration system, which works against the pollution of the chunk?
Chimneys with have to be a specific size in height to lower pollution?
NBC-Hazmat suit to withstand acid rain or gasmask/respirator against the polluted air?
1 Multiblock Air Filtration cleans one/nine chunks of pollution.
Efficiency/speed depends on applied filters (different tiers) and supplied energy.