Question

how much co2 present on earth in starting (when earth is born)​

Answer 1

The concentration of carbon dioxide in Earth's atmosphere is currently at nearly 412 parts per million (ppm) and rising.

This represents a 47 percent increase since the beginning of the Industrial Age, when the concentration was near 280 ppm

And an 11 percent increase since 2000, when it was near 370 ppm

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Answer 2

the concentration of carbon dioxide in earth's atmosphere is currently at nearly 412 parts. per million s ( ppm) and rising . their represents a 47 percent increase since the begging of the industrial age, when the concentration was near 280 ( ppm) and an 11 percent increase since 2000, when it was near 370 ppm.