I have visited many sites on the subject. Some sites say that certain houseplants are good for copd patients, then other sites are saying the opposite. I have heard of some saying they keep some plants in their bedroom to help. my question is, do ant of you have them in your bedroom? do they cause allergy flair ups? I have houseplants but wanted to find out more on the subject before I put some in mama's bedroom. my computer don't like to do much these days. freezes up, gets hot, then shuts off. but I did manage to visit sites on this matter, but getting several different results