Question

How is the atmosphere of the Earth different from those around the other planets?​

Answer 1

Answer:

The main difference between the Earth's atmosphere and the one of other planets (such as Venus and Mars) is that about 21% of it is composed by oxygen. Oxygen is a key element to sustain any complex life form on the planet. ... Both produce oxygen by means of photosynthesis.

Answer 2

Answer:

Our atmosphere is about 78% nitrogen and 21% oxygen, with traces of other things like water and carbon dioxide. It's an odd mix compared to the atmospheres of other planets. ... When planets initially form, their composition is mostly hydrogen and helium.

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