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Chloroplast and Photosynthesis - Class XII
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Amount of $ C{ O} _{ 2 } $ mixed annually is about
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A
$70\times 1{ 0 }^{10 } Kg $
💡 Explanation:
David Keeling started measuring the annual CO2 production from an observatory in Hawaii. He found the amount to be $70\times 1 { 0 } ^ { 10 } Kg$.
So, the correct option is '$70\times 1 { 0 } ^ { 10 } Kg$'