Exactly how secure clean air in your residense or office? The answer to that question thanks researcher who resides probably the most polluted cities in the earth: Delhi. The problem of lack of clean air and touched him personally because of allergies his lung ability decreased to 70%. With the help of NASA discovered how to ensure access to ticket while living even in that polluted place like Delhi. The solution to your complaint is not found somewhere else than in nature. As it turns out and about, there are three regular houseplants, which are able to supply human survival even in a tightly enclosed space!