Given the challenges of depreciating quality of air and changes in lifestyle, there comes up a need to watch the quality of air we breathe. A refreshing interior flower can do much more than adding looks to your home décor. Going by recent studies, most of the inside houseplants are effective at cleaning the environment circulating around. These can absorb harmful substances such as formaldehyde, which is said to cause irritation of respiratory tract. Easy to grow, sitting pretty in your house or office, in house plants are the best natural way to filter out unhealthy toxins from the air that goes into your lungs.