> "How much would it cost to lower the PM 2.5 in his house? Even cut it in half?" In one room, plausibly reduce it by 99% for a one-off $70 air purifier and $3

> "How much would it cost to lower the PM 2.5 in his house? Even cut it in half?" In one room, plausibly reduce it by 99% for a one-off $70 air purifier and $30/year of electricity costs and replacement filters: https://dynomight.net/ikea-purifier/ https://dynomight.net/ikea-purifier/