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More importantly, we know with a high degree of certainty that human global emissions tip the earth's overall carbon output/downtake balance to net output (by a
by dwaltrip 9y ago
More importantly, we know with a high degree of certainty that human global emissions tip the earth's overall carbon output/downtake balance to net output (by a few dozen gigatons, I believe), which the models say is enough to trigger the increase to 400ppm over the past century or so.
- acqq 9y agoAnd we know it's humans who made the increase of CO2 from the measurements of the carbon isotopes in the ice cores, which stored the state of the air from the earlier times. Human burning of the fossil fuels changes the isotope ratio exactly: it is certain that just humans, burning the fossil fuels, are those who change the CO2 concentration through the years.