I think it's similar to alcohol, there's probably no usage level that's "Safe" but there are ways to mitigate the problems. With weed, smoking it is certainly

I think it's similar to alcohol, there's probably no usage level that's "Safe" but there are ways to mitigate the problems. With weed, smoking it is certainly a terrible idea but many of the issues can be minimized by primarily using edibles. Just never a good idea to inhale anything that's combusted.