Three plants are necessary for oxygen: 1. Mother in Law's Tongue (provides oxygen during night) 2. Areca Palm (provides oxygen whole day) 3. Money Plant (provides oxygen whole day) Please must ensure these type of plants in your home as well as in your bed room.
 



ناسا کی رپورٹ

https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19930073077.pdf

more about it


https://en.wikipedia.org/wiki/NASA_Clean_Air_Study