The Ancient Healing Technique

Havan or Yagna to bactericide your surroundings
What could be a better reason to perform havan than to please the Almighty along with keeping house bacteria free? To lead a healthy life, perform a discectomy on your house with havan. If you are one of those who believe that most of the religious practices have a solid scientific reason behind them, a havan is a healthy treat for you.
A study carried out at National Botanical Research Institute (NBRI) associates havan or yagna with a healthy effect. As per the research, the smoke omission caused by the havan deeply cleans the house air. The havan smoke decreases airborne bacteria up to satisfactory scale which leads to diminishing infections possibility.
Havan is performed through a specific process which may vary as per the availability of the stuff at any particular place or culture. Mostly, all the things on the havan list are all natural and easily available in the place. These things are included in the name of the God offerings while a substantial number of benefits are associated with them in reality.
Prominent Havan items
Havan Kund (lined with Aluminum foil)  

Indian holy book Yajurveda provides a sacred procedure of performing Yagna as one of the ways to do pious deeds. The first mantra itself in Yajurveda says that humans ought to perform yajna which is a prescribed process of offering things to agni while enchanting mantras. This process will prevent the infectious disease and provide undying pleasure.
Another holy book Saamveda asserts that the samagri (stuff) offered to fire reaches to the sky with smoke and cleans the atmosphere. This leads to pure air and healthy environment. This very book also states that this activity promotes a better cycle of weather resulting into rain. There are a number of stories related to the state of drought and yagna performed by kings and sages all across ancient India hoping ample rain as result. 
As per the mantra number 1379 in Saamveda, the yagna promotes a number of humans, birds and beasts. Mantra number 1380 includes the notion that increases the overall age of living beings. Yajurveda does hold an account of the benefits of yagna saying that the yagna purifies the planet earth making it a humble and sustainable abode for humans and other living beings.
As per the Yajurveda, the same rule of boiling water for its purification applies on air as well. The air gets boiled on the flame of yagna and goes up in the sky while the impure and cold air comes down to touch the fire and becomes pure.
 Trelle, a French scientist, performed an experiment to prove benefits of yagna. He notified that the best outcome of the yagna can be achieved through using mango stick as the igniting object to get a long lasting flame. This wood burning results into a gas ‘formic aldehyde’ emission which destroys harmful bacteria. The very scientist also experimented the burning of jaggery (gud) and found that same gas is generated. 
A scientist namely Tautilk said that staying in the yagna environment for as long as half an hour can result into the destruction of typhoid generating germs. To get desired outcome of the yagna, incorporation of sweet like honey, jaggery or sugar and nutrition including ghee and fragrant stuff like cardamom and a range of flowers is advised. Other essential things are antibiotic natural herbs like gyol and sandal stick.