Precious woods for a mega-Havan are being burnt in Uttar Pradesh, India, when the poor are desperately looking for some fuel for cooking. In this ritual protein-rich ghee is also used in very large quantities, rather it can be given to malnourished poor children for their growth. All the Havan stunts are being performed in the name of purification of the atmosphere, but these rituals definitely add to more pollution.
-Promod Puri, author Hinduism Beyond Rituals,Customs And Traditions
Havan is equivalent to Heaven for them. You talked about the wood and the ghee and their suitable use. Who knows how much manpower and manhours will be wasted?