 NASA ọkà mmụta sayensị na mgbe afọ 20 nke research hụrụ na na 24-hour ọkụ ọnọdụ, a ite nke aloe ike iwepụ 1 cubic mita nke ikuku dị 90 formaldehyde; ite Chlorophytum nwere ike ịbụ stoves, eletriki ngwa, plastic ngwaahịa The nkesa nke carbon monoxide na nitrogen peroxide etinye obi gị dum na-agwụ, ma siphon anya 86 of formaldehyde; epupụta na ndị ọzọ na nnukwu akwụkwọ osisi epupụta ike banye karịa 80 nke ime ụlọ na-emerụ, haruru. 