Plants that help defend against dangers
Hi, my name is Andrew and I just recently have become interested in botany, so I'm very new and am in need of much help.
I would like to start my own small modest little garden, and I was wondering if there were actually any types of common household (or non-common) plants that help defend against certain types of dangers or harmful things inside the house, such as certain bacteria or something? And if not defend, then help in any way. I guess I'm just wondering if there are any types of plants that would be beneficial towards the people living in that house.
My father is starting to get older, and to be honest, I'm a bit of a worry-wart, so I'd like to make sure the air around him is healthy, and hoped that maybe there were some plants that could help towards this in any way. Thank you.