This is where you live.
Earth is a living spaceship, floating through the sea of the universe.
The ecostructure of Earth is a complex, self-regulating mechanism like the body of a living creature. It is capable of producing food and oxygen and is also capable of recycling waste products. It is not 'delicate' as many conservationists would suggest, but highly resilient to the strains sometimes placed upon it. Like any living creature, it is capable of healing itself when it falls ill. Recently, however, we humans have placed enormous strain upon Earth, sucking resources from it and providing only waste products in return.