Our neighbours smoke a lot of pot. Which would be none of my business, only we live in a terrace and at night I can smell it really strongly in my 7 month old DS's bedroom. I'm worried it could be harming him, raising the risk of SIDS etc. DP thinks this isn't a problem and I'm not actually smelling smoke, just a lingering smell. But I'm not convinced. Does anyone know whether I'm worrying unnecessarily or not? What do you think I should do (we don't really know the neighbours at all and I'm not sure how they would react if approached about this!)