Just how secure clean air in your home or office? The answer to this kind of question thanks researcher who resides essentially the most polluted cities in the world: Delhi. The problem of insufficient clean air and touched him personally due to allergies his lung potential decreased to 70%. With the help of NASA discovered how you can ensure access to outside while living even in this 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 tightly enclosed space!