What are the effects of trees/plants on PM2.5 pollution? Are there plants that catch more? Do damp leaves catch more?

Does watering plants with a mist pull extra microparticles out of the air vs a stream? (if so, Do plants mind or benefit from the extra stuff in their water?)

Are there any “permaculture” solutions for air filtration? Could a filter caked with pm2.5 black carbon and whatnot be useful for anything else? Can I manufacture a filter that will reduce pm2.5 using home grown plant materials?

What if I converted a wall of my shed into all filtration material, made it airtight, and pushed air out the other side of the shed under solar power? How would 100sqft of filter give flexibility of filter media?

If I made a giant/parallelized bong in my backyard that constantly pulled air through water to try to catch microparticles, how big would it have to be to have an appreciable effect?