What is O2 and CO2?
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Answer:
Oxygen (O2) and carbon dioxide (CO2) are both atmospheric gases that are necessary for life. ... Plants take CO2 and break it down in photosynthesis, producing O2 as a byproduct. Animals breathe O2 and use it for cellular respiration, producing energy and CO2.
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Answer:
O² means carbon-di-oxide and CO² is oxygen.