??? ?? ????? ??? ???? ?????? ?????? ??? ???? ????? ?????? ??? ????? ?????????? ????? ?????? ? ? ?????? ????? ? ???? ?????? ???????? ????????? ???????. ???? ????? ?? ???? ????? ???? ?????Portland State University researchers documented in 2015 that vapor merchandise manufactured higher levels of formaldehyde—even more than cigarettes.???? ???? ???