We moved to big cities in hopes of living better lives, and we have certainly been able to do so. However, there is another side to this story. As residents of big cities, we also face certain challenges, pollution being the biggest one. Poor air quality in cities such as Delhi adversely impacts the health of its residents, for example. Sensing a great business opportunity here, many companies have launched air purifier that would help you breathe in the fresh air. Recently, some of the foreign brands have launched their specialized…