evidence: CLAIM: A NASA study found that six to eight snake plants in a room with no airflow is enough for human survival. The agency therefore recommends 15 to 18 plants for an 1,800-square-foot home. AP’S ASSESSMENT: False. The agency did not reach those conclusions or offer such recommendations, a spokesperson confirmed. The claim may be a distortion of a1989 NASA report focused on whether indoor plants can help clean the air, not sustain human life. An expert in plant biochemistry further said six to eight snake plants, as claimed, wouldn’t produce the level of oxygen required by a human in a day. [...] "According to NASA’s Clean Air Study, the Snake Plant is so effective in producing oxygen that if you were locked in a sealed room with no airflow (yikes!), you would be able to survive with just 6-8 plants in it," text on the video reads. "NASA recommends 15 to 18 medium-to-large size plants for a 1,800 square-foot home for optimum air quality."