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https://www.youtube.com/watch?v=GVU_zANtroE Oxygen forms about 21% of the air around us. In your body, oxygen forms a vital role in the production of energy in most cells. But if gases can only... read more
https://youtu.be/ffjIyms1BX4 Learn the basic science of climate change in 24 easy steps Subscribe to It's Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on... read more
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