The atmosphere of Earth protects life on Earth by creating pressure allowing for liquid water to exist on the Earth's surface, absorbing ultraviolet solar radiation, warming the surface through heat retention (greenhouse effect), and reducing temperature extremes between day and night (the diurnal temperature variation

The Earth's atmosphere protects and sustains the planet's inhabitants by providing warmth and absorbing harmful solar rays. In addition to containing the oxygen and carbon dioxide, which living things need to survive, the atmosphere traps the sun's energy and wards off many of the dangers of space

2: a mass of gases that surround a planet or star
The planets have different atmospheres.

3: the air in a particular place or area

broadly : the aqueous envelope of the earth including bodies of water and aqueous vapor in the atmosphere

- living organisms together with their environment

 1. Conservation - to contribute to conservation of landscapes, ecosystems, species and genetic variation; 2. Development - to foster socio-culturally and ecologically sustainable economic and human development; 

 The biosphere provides the necessary environmental conditions for survival. Living organisms are required to adapt to the environment of the biosphere. The biosphere is home to biodiversity within ecosystems while providing a reliable source of food on Earth. Biodiversity is just as it says: biological diversity.

2: one of the shells or spherical layers within the earth delimited above and below by discontinuities