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Carbon dioxide concentrations dropped from 4,000 parts per million during the Cambrian period about 500 million years ago to as low as 180 parts per million dur
by URfejk 5y ago
Carbon dioxide concentrations dropped from 4,000 parts per million during the Cambrian period about 500 million years ago to as low as 180 parts per million during the Quaternary glaciation of the last two million years:
https://en.m.wikipedia.org/wiki/Carbon_dioxide_in_Earth%27s_atmosphere https://en.m.wikipedia.org/wiki/Carbon_dioxide_in_Earth%27s_...
- cung 5y agoI would argue 500 million years ago is not ”not so long ago”. The Cambrian period also didn’t have more than a microbial soil crust living outside of oceans.
- hntroll1110 5y agoHow old do you think the earth is?