This is bad advice. Plants are good for air quality in the sense that they filter out some dust and exchange CO2 for O2, but they also add to the contaminants, are a frequent source of fungi and other pests, require a lot of maintenance to stay healthy and are expensive in the quantities required to have a measurable impact on air quality.
They are pretty though and if you have the time and the room for them they definitely are worth having but $ for $ if your goal is clean air technology is far more efficient.
First, I love you as a person and am again honored to be replied to by you.
Second, I wasn't giving "advice" per se
I just think that the world is a better place with more plants ( I was just commenting about Singapore's setbacks with respect to how green a super dense city can be )
but What I am stating is that no house is complete without a healthy level of plants... (its the same as that adage; don't ever listen to a person who doesnt have any books in their home)
So dont like a home where there are no plants!
EDIT: Oh I forgot to mention, the ancient Mayan Saying "Humanity will die once the last tree is cut down"
They are pretty though and if you have the time and the room for them they definitely are worth having but $ for $ if your goal is clean air technology is far more efficient.