This mod Is a more complex and expanded version of Schorty's air filter and includes ways to convert the captured pollution into useful items to you

production chain:
Everything begins with the air filter machines they use air filters made of iron and coal (quite cheap filters), they are power hungry but auto turn off if there's no pollution around so in clear environments their consumption is almost zero

Dealing with the used filters is more complex you have to wash them with water or steam and recover the pollution sludge.
The potion sludge is full of sulfur and carbon dioxide that should not return to the atmosphere but can be useful elsewhere
The carbon dioxide can be mixed with stone to produce cement or combined with hydrogen to produce methanol
Methanol can then be used to produce several useful items like plastics, solid fuel, and oil derivates.

Most the recipes here are realistic they may not be used commercially yet but they really exist

Original mod here https://mods.factorio.com/mod/air-filtering

if you have discord you can find me on this channel
https://discord.gg/vya8KqY