Gaia

Gaia Theory
In the 1960s, British scientist James Lovelock postulated that the entire planet earth was a living system not unlike a single organism. He chose the name Gaia based on the mythological Greek earth goddess of the same name. Every aspect of the planet, both living and non-living, together comprises Gaia.

Greek Goddess Gaia
To ancient Greeks, the land was a living feminine entity known as Gaia. This sentiment prevails throughout the world and a number of cultures and traditions view Nature as a feminine force.

Gaia Movements
There are spiritual, environmental, and personal growth groups around the planet which use the name Gaia in their titles and missions. There's a great list here.