How secure clean air at your residence or office? The answer to this specific question thanks researcher who resides just about the most polluted cities in the world: Delhi. The problem of deficit of clean air and touched him personally caused by allergies his lung volume decreased to 70%. With the help of NASA discovered the best way to ensure access to ticket while living even ordinary polluted place like Delhi. The solution to your complaint is not found anywhere else than in nature. As it turns available, there are three ordinary houseplants, which are able to offer human survival even in a very tightly enclosed space!