evidence: Snake Plant a.k.a. Mother-In-Law’s Tongue (MILTs): Of all the different oxygen producing plants, this one is unique since it converts a lot of CO2 (carbon dioxide) to O2 (oxygen) at night, making it ideal to have several in your bedroom. 6-8 plants are needed per person to survive if there is no air flow (meaning you could live in a completely air sealed room if you had these plants). The snake plant also removes formaldehyde from the air. [...] The Snake plant purifies air by absorbing toxins through the leaves and producing pure oxygen. In fact, the Sansevieria is an ideal bedroom plant. Whereas most other plants release carbon dioxide at night (in the absence of photosynthesis), the Sansevieria continues to produce oxygen. [...] With its interesting foliage and ease of growing, the snake plant is one of the most popular air purifying plants. It has been scientifically proven that snake plant can absorb poisonous gases in the air and releases night time oxygen. It will give a natural humid atmosphere around you along with being anti-allergic and fighting Sick Building Syndrome. Now we also know that it’s also lucky to have it in home and office. This makes it a perfect pick. Adding snake plants will provide you with an added benefit of keeping interiors beautiful and healthy.