Fake news. Smaller particles from exhaust are way worse for you than larger particles from tires. Within a category like PM2.5, mass is a terrible metric. A giv

Fake news. Smaller particles from exhaust are way worse for you than larger particles from tires. Within a category like PM2.5, mass is a terrible metric. A given mass of fuel exhaust will contain orders of magnitude more particles because they are tinier. Smaller particles can penetrate deeper into your lungs and can go into your bloodstream.