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First of all it is spelled 'Oxygen'.
It is not that Earth's Oxygen is more breathable than another planet's. We have just evolved to need Oxygen to live. Other planets don't have as much Oxygen as we need to live. They have other gases that would kill us instantly. That is why we need spacesuits to be able to walk on the moon and other planets. The same goes for Outer Space. Outer Space has no Oxygen at all.
What else can I help you with?
Related Questions
How much of the earths atmosphere is made up of nitrogen and oxygen?
The earths atmosphere is made up of 78% nitrogen and 21% oxygen
Elements in the earths crust?
is it oxygen
What percent of earths atmosphere is oxygen?
97%
Does the ocean help with the earths oxygen?
Yes
Is most of the earths atmosphere covered with oxygen?
no
The primitave earths atmosphere did not contain?
Oxygen gas
The primative earths atmosphere did not contain?
Free oxygen
What is the major source of oxygen for the earths atmosphere is?
Plants
What gas was not part of early earths atmosphere?
oxygen
Which gas is not part of earths original athmosphere?
Oxygen.
How much of earths crust is made up of oxygen and silcon?
47 % oxygen & 27% silicon.
What is oxygen most commonly found in?
Oxygen is most commonly found in the air of Earths atmosphere.
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