Pantheism is is a philosophical worldview that asserts god and nature are the same.
Wikimedia provides the following information about Pantheism:
Pantheism is the view that the Universe (Nature) and God are identical. Pantheists thus do not believe in a personal, anthropomorphic or creator god. The word derives from the Ancient Greek: πᾶν (pan) meaning ‘all’ and θεός (theos) meaning ‘God’. As such, Pantheism denotes the idea that “God” is best seen as a way of relating to the Universe. Although there are divergences within Pantheism, the central ideas found in almost all versions are the Cosmos as an all-encompassing unity and the sacredness of Nature.