A  biosphere (Ancient Greek: βíος [bio] for “life”, and σφαίρα [sphaira] for “sphere”) is the global ecological system integrating all living beings and their relationships, including their interaction with the elements of the lithosphere, hydrosphere, and atmosphere. Is the global sum of all ecosystems. It can also be termed as the zone of “life on Earth”, a closed system (apart from solar and cosmic radiation and heat from the interior of the Earth), and largely self-regulating.