‘Peepal’ tree is almost useless for an ordinary person, except for its shadow. ‘Peepal’ does not a have a delicious fruit, its wood is not strong enough for any purpose then why should a common villager or person worship it or even care for it? Our ancestors knew that ‘Peepal’ is one of the very few trees (or probably the only tree) which produces oxygen even at night. So in order to save this tree because of its unique property they related it to God/religion.
Hindus regard trees and plants as sacred. The Lord, the life in us, pervades all living beings, be they plants or animals. Hence, they are all regarded as sacred. Human life on earth depends on plants and trees. They give us the vital factors that make life possible on earth: food, oxygen, clothing, shelter, medicines etc. Hence, in India, we are taught to regard trees and plants as sacred. Indians scriptures tell us to plant ten trees if, for any reason, we have to cut one. We are advised to use parts of trees and plants only as much as is needed for food, fuel, shelter etc. we are also urged to apologies to a plant or tree before cutting it to avoid incurring a specific sin named soona. Certain trees and plants like tulasi, peepal etc., which have tremendous beneficial qualities, are worshipped till today. It is believed that divine beings manifest as trees and plants, and many people worship them to fulfill their desires or to please the Lord.
It should also be noted that, "Gautama Buddha attained enlightment after meditating under a peepal (Also called as Bodhi) tree. Peepal trees have many medicinal uses. Juices extracted from the leaves is used as ear drops. The bark is used to heal inflammations of the neck and glandular swellings. Chewing the roots of the banyan tree is said to help prevent gum disease.