Yagya- A boon for and from the nature

Havan has a significant role in Indian culture. Be it a marriage, birthday, grihapravesh or bhumi Pujan, Havan is performed incontestably. But have you ever wondered what are the reasons behind performing this ritual? Is it just an age old ritual, a superstition or is it something really meaningful with an incredible outcome, which is losing its importance with each passing day.