EPA has announced that out will review the PM2.5 NAAQS that the Trump EPA decided to leave unchanged from the Obama EPA setting at 12 micrograms/m3. This marks the start of the Biden EPA’s bid to go back to the fraudulent use of PM2.5 as its most potent regulatory weapon and portends all sport of bad regulations, including backdoor climate regulation. Stay tuned for developments. As before, JunkScience.com will lead the fight against EPA on this. Please support our efforts.