3 ms·

>"Today's CO2 concentration of around 400 ppm exceeds the natural variability seen over hundreds of thousands of years,"[0] That's the part that opens and shut

>"Today's CO2 concentration of around 400 ppm exceeds the natural variability seen over hundreds of thousands of years,"[0] That's the part that opens and shut's the "debate" surrounding human-cause climate change. When you have that much data, combined with the fact that we build and use machines that spew carbon there can not be any other explanation for the Co2 levels. Case closed. [0]: http://www.independent.co.uk/environment/carbon-dioxide-co2-atmosphere-environment-climate-change-global-warming-un-a8026931.html http://www.independent.co.uk/environment/carbon-dioxide-co2-...

deleted 9y ago
[deleted]
aidenn0 9y ago
Except there has been a huge amount of effort of discrediting geological data. On the most extreme, 10% of the population of the US believes the earth to be on the order of 10k years old, which immediately makes the entire geologic record suspect. On lesser extremes, there are arguments that for much of the Phanerozoic. CO2 concentrations were much, much higher, and a lot of money was spent pushing the idea that returning to such levels would be benign.
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 ago
  And 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.

3 ms·

>"Today's CO2 concentration of around 400 ppm exceeds the natural variability seen over hundreds of thousands of years,"[0] That's the part that opens and shut

by alistproducer2 9y ago

deleted 9y ago
[deleted]
aidenn0 9y ago
Except there has been a huge amount of effort of discrediting geological data. On the most extreme, 10% of the population of the US believes the earth to be on the order of 10k years old, which immediately makes the entire geologic record suspect. On lesser extremes, there are arguments that for much of the Phanerozoic. CO2 concentrations were much, much higher, and a lot of money was spent pushing the idea that returning to such levels would be benign.
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 ago
  And 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.