It is believed that a puja with devotion can solve any problem. But, it is very important that all the rules set for pujas and rituals are followed properly for it to be fruitful.
Every item used during pujas and havan not just has religious importance but are also the result of scientific knowledge of our sages and saints. One such item is kapur or camphor. It is mostly used during 'aartis'.
It is believed that 'aarti' appeases Gods and Goddesses. It is believed that lighting kapur even rectifies devdosh and pitrdosh. Kapur's aroma makes the air fresh.
Scientifically it is believed that lighting kapur kills harmful germs present in the air and purifies it.