Maybe that person has to smoke marijuana for a medicinal condition like severe pain and nausea from cancer. When it gets very bad maybe you can go for a walk to get fresh air, or open the windows a few inches.
Lord bring peace among these neighbors, and let it be peace in their midst. Bring the proper solution for this situation as you give this guest the peace that only you can give us. In Jesus mighty name I pray amen.
Luke 6:27-28
But I say to you who hear, Love your enemies, do good to those who hate you, bless those who curse you, pray for those who abuse you.