The way secure clean air in your residense or office? The answer to this question thanks researcher who resides probably the most polluted cities in the planet: Delhi. The problem of lack of clean air and touched him personally due to allergies his lung ability decreased to 70%. With the help of NASA discovered the best way to ensure access to outside while living even in their normal polluted place like Delhi. The solution to your short lived problem is not found in other places than in nature. As it turns available, there are three ordinary houseplants, which are able to offer human survival even in the tightly enclosed space!