The way secure clean air at your residence 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 not enough clean air and touched him personally on account of allergies his lung capability 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 in other places than in nature. As it turns out there, there are three regular houseplants, which are able to deliver human survival even in a very tightly enclosed space!