Pollution in India has been a problem ever since the country went through a major industrial revolution following its independence from Britain. Cities like Ludhiana in Punjab have gotten so bad in this regard that the majority of flights from the area are unable to take off for days at a time. Recently, a group of international beauty queens visited the city, and the common complaint about the city was the state of the air.
Punjab Agricultural University is located a few miles away from the city proper and has recently become an extremely popular place for walking as a result of the city's high pollution. It has become so popular, in fact, that the university began requiring permits from those on the campus. Still, despite the permit fee, many city dwellers are paying it happily and travel for miles for the opportunity to take a walk and clear their lungs of the dirty city air.
This clamor for clean air is a strong indicator of the difference it makes not only to one's energy, but also health. If you want to make a similar stand for your health and energy level, consider investing in a medical-grade air purifier and fill your home with clean, fresh air.