Investing in a quality dry herb vaporizer is even more cost effective. I don’t even smoke very often but have the coveted Volcano and it is incredible.
I’ve also heard the occasional bad news about the heated ceramic and wiring in the heaters. OTOH, I don’t seem to be harmed yet, and it’s not like city air isn’t filled with other toxins.
Remember when everything shut down globally, and how clear the air became? And then we went right on back to choking on our own waste.
(I have FlowerMate Slick)