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Nitpicking, but it's 0.04%, sadly.

dumb question but like, 100 years, was it 0.03% and little by little it has crept up to 0.04% due to "humanity" lately?

It's not a dumb question. You're right. It was just below 300ppm a century ago, and it's a bit over 410ppm now. https://climate.nasa.gov/news/2915/the-atmosphere-getting-a-... is a good overview.

The NOAA has a station on Mauna Loa in Hawaii. It has been continuously collecting CO2 data since 1958 and CO2 has gone from just over 300ppm to the current 414ppm.

How much carbon capture would it take to get from 414ppm to 300ppm? Or is the new goal to just stay at/around 414ppm and not go backwards?

Thanks for the correction! Fixed.

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