Also consider pantheistic strands in "modern" religion which equate nature with deity - and which the monotheistic churches considered the worst kind of heresy.
My guess would be that people revered nature in those aspects of life when the could not control it via technology or social organization (cf. the classic Malinowski's work on Tribriand Islanders). When their gained technology that allowed them to control that aspect of nature, the reverence was not longer needed and disappeared. Religious treatment of nature was only a reflection of the material capabilities of humans to control it.
Wojtek