Manusmriti 4:73:- Let him not enter a walled village or house except by the gate, and by night let him keep away from trees.
I don't understand why Manusmriti talks about this unnecessary law. What's wrong happen with trees during the night? Modern science says that as plants release CO2 during the night, we should not go near them. Is this the same reason behind the Manusmriti verse or is there any mythological explanation for this?