The Biosphere

The biosphere is the global sum of all ecosystems or the total area of land, sea and air that is inhabited by living things. The only biosphere we know of is earth but there may be other biospheres in our own solar system. For example, there could be life on Mars,. There could be life under the ice of Europa, which is a moon of Jupiter. So it's basically everything, that everything and all places where life exists.