Animism - The doctrine that supernatural beings (or souls) endowed with reason, intelligence and volition inhabit ordinary objects, tools, animals and natural phenomena. The human being is often regarded as on a roughly equal footing with animals, plants and natural forces.
(.....more worship of nature's pagan gods by the junk environmentalists of the Left).
Leni
It's not nice to fool with Mother Nature.
These spirits became converted to Buddhism and thus became helpers of the monks. This was a deliberate policy on the part of King Anawratha and the rulers of Burma in the 11th century.
At the same time, these spirits often have their own ceremonies and festivals and are worshipped in addition to the Buddha. There are 37 officially recognized Nats, each with its own history and image.
The Nats, as spirits of natural forces, such as water, wind, stones and trees, take many guises. The Nats are all ghosts or spirits of heroes except for one, the chief Nat, Thagyamin Nat (the Indian god Indra, protector of royalty) who was elevated to this position in the 11th century by the great unifier, King Anawratha, who integrated Nat worship into Buddhism.
Thus the Nats became the guardians of the state and royal family and guarantors of dynastic continuity. Each Nat has its own history or legend which places the Nat in an important or heroic role in Burmese history.
While some Burmese regard Nat worship as mere superstition, most people do pay some attention to them and regard the Nat worship as a method of dealing with or solving the problems of this life, whereas Buddhism is concerned with future lives.
What's new is old - pagan goddess of the earth worship is old hat in south east asia.