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No. Earth's oxygen is provided by plants. Humans need oxygen to live, so we could not have been there before there was oxygen, so we could not have made the oxygen.
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Do lungs absorb all of the oxygen present in the air?
Not all but most. there is no system, manmade or natural, that is 100% efficent.
Is lithium manmade?
No. Lithium is a naturally occurring element.
Is sodium hydroxide natural or synthetic?
Sodium hydroxide is a manmade substance.
Is ammonia manmade?
Ammonia does occur naturally, but it is manufactured on an industrial scale.
What is the most common type of element on the periodic table?
The most abundant element in the universe is Hydrogen (H). The second most common is Helium (He). However, these are only found in trace amounts on Earth. Add: Most elements are metals.
Do lungs absorb all of the oxygen present in the air?
Not all but most. there is no system, manmade or natural, that is 100% efficent.
Is Dacron natural or manmade?
it is manmade
Is lantern manmade or nature?
Manmade actually.
Are the twin towers natural or manmade?
Manmade
Is rayon a natural fiber or manmade fiber?
manmade
When did Manmade God end?
Manmade God ended in 2004.
When was Manmade God created?
Manmade God was created in 2001.
What are california's manmade tourist attractions?
what are califonia's manmade tourist atraction
What advantages people get from manmade pond?
people get lun from manmade pond
Is the Great Wall of China a manmade wonder?
Yes the Great Wall of China is manmade .
Are humans manmade or natural?
we are all natural because we weren't made in a factory we were made natural.Things that are made in factorys are manmade we are not manmade we are natural. Katrina LaChance- Bermuda138
Was the moon manmade?
No.
