On breaks, lunch etc. I've witnessed many employees (including leaders who I won't mention my name) outside getting high, especially in the evening. Even saw purchases happen. This is very concerning on many levels. I'm concerned for my safety. This has been raised to HR on many occasions with nothing being done to stop it. I can't stand the smell of these people when they come back into work. Having a manager smell like pot is wrong, disrespectful and illegal. Was told this practice is tolerated because upper mgt does it...not good.