They used filters air VS diesel exhaust. Not diesel exhaust and normal outdoor air. Perfect example of science in bed with grant money to push a narrative.

Next come the calls for action and equity. Very expensive destructive game.

"Alone, these new findings are not particularly meaningful. No evaluations were performed in the study to suggest the observed DMN changes impacted cognition. But alongside a growing body of epidemiological and preclinical studies linking air pollution with a number of neurodegenerative diseases, these findings may be much more significant. They effectively demonstrate the acute effects of air pollution on the human brain in a way never before shown."