We've had in the last 100 years a temperature swing that usually takes a thousand years or more. We've already seen greater than +1C of temperature increase compared to before widespread use of fossil fuels.
Is that caused by humans? Sure that's up for debate, in the same way whether tobacco causes cancer is. People are willing to be wrong when being wrong gives them money/status/utility.
> We've had in the last 100 years a temperature swing that usually takes a thousand years or more.
A cute xkcd is not a time machine. You rely here on indirect measurements of tree ring measurements or ocean sediments. You can't verify if there were any other factors at play over the millennia, and I seriously doubt that these methods can even be theoretically +/- 0.5 degree C accurate. You may believe that, but you can't verify unless you travel into the past. Besides, 1000 years are NOTHING on the scale we are looking at. If you live anywhere north of the 40th degree, the place you now sit was probably covered by an ice sheet without a living thing in sight, only 10000 years ago. And a 100000 years ago. There is no way that you can divide that timescale into thousands and measure every one of them with a high enough precision to compare it with the present. The bold claims of climate science have lost any scientific humility.
What about them, and how was your debate class?
Can you measure the time of day an organism died with radiocarbon dating? This rhethorical question is meant as a hint.
Did you know how they calibrated radiocarbon at first? They used wine bottles from french cellars, because they have a year printed on them. That's scientific verification, because believe doesn't do it.
We've had in the last 100 years a temperature swing that usually takes a thousand years or more. We've already seen greater than +1C of temperature increase compared to before widespread use of fossil fuels.
Is that caused by humans? Sure that's up for debate, in the same way whether tobacco causes cancer is. People are willing to be wrong when being wrong gives them money/status/utility.