The presence of ozone is important because it shields living organisms from some harmful radiation from the Sun.
As it happens, the vibrational frequency of the atoms in ozone matches that of UV light, consequently it protects organisms on earth by absorbing (in the upper atmosphere) most of the UV radiation before it hits people and other living things here on the surface. Unfortunately ozone in the lower atmosphere is actually harmful to most living things since it is very reactive. It irritates our respiratory systems and eyes as well as attacking cellular membranes of plants and participating in reactions that produce other types of pollution.
oxygen
Ozone is an important form of oxygen. It forms a miracle layer in atmosphere.
Oxygen is the gas in the atmosphere that is important for respiration. It is needed by cells to generate energy through the process of cellular respiration.
The most important gases when studying the atmosphere are nitrogen and oxygen (as O2 and O3).
The most important elements in the Earth's atmosphere are N (nitrogen) and O (oxygen).
Earth's atmosphere is mainly nitrogen, oxygen, carbon dioxide, and water vapor. Oxygen is the most reactive of these. Oxygen allows all of the life as we know it on earth. Even though oxygen is less than 1/4 of the atmosphere it is the most important part.
I'd say the most important gasses in the Earth's atmosphere are oxygen and water vapour.
Oxygen is necessary for most organisms to carry out their life functions.
the atmosphere is important because without the atmosphere the oxygen would escape from our atmosphere into space and without the atmosphere we would all dye because there would be nothing to protect us from the suns heat
it is important because if they don't know the temperature they
weathering and erosion
The atmosphere is 79.9% oxygen.