Trucks and shops are definitley one of the biggest problems for riverside. These are the biggest source of pm2.5 precursors because the wind patterns basically

Trucks and shops are definitley one of the biggest problems for riverside. These are the biggest source of pm2.5 precursors because the wind patterns basically funnel all of the LA basin atmosphere out there and the pollution transforms over the 24-36 hr journey. I used to work for air pollution regulators. I don’t have the citations but I’ve seen the presentations.