From @littlethingsmtr : "Can “safe” levels of air pollution affect your child’s brain function? Researchers at USC found that yes, greater exposure to PM2.5 can increase the number of connections between different parts of the brain, while more exposure to NO2 had the opposite effect. Higher ozone exposure can lead to more connections within the brain’s cortex default mode network, associated with mind-wandering/day-dreaming.. Though more connections in the brain may sound good, adolescence is an important time in brain development where some connections are strengthened while others are pruned, all to make the brain more efficient. Researchers believe that any change to the normal trajectory of brain development may have negative effects later in life. These changes occurred even though the American air quality was labeled “safe” under EPA standards. Read the full article at https://bit.ly/3YewWro Limit your exposure to air pollution: Monitor the outdoor air quality. Use a HEPA filter indoors. Support policies and politicians that will reduce emissions from transport and industry."