> "a few degrees, what difference does that make?"

Maybe this helps: Think about when we have a fever of "a few degrees", say, instead of 37 degree Celsius, we have 40. It shows that also a few degrees can make a huge difference.

Just figure out how many 7-foot-tall persons you'd have to add to your country to increase the average height by 1 inch.

7 feet = 2.1336 meters 1 inch = 2.54 centimeters

Think even bigger. 1 degrees inside your house? Not noticeable at all. But on a planet-wide scale? A 1 degree difference requires a LOT of energy.

It's like boiling a cup of water vs an Olympic sized swimming pool. The latter is going to take a lot more energy than the former.

The temperature of a fever is not measuring the temperature outside.

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This may be hard to understand, but that was an illustrative example on why sometimes a few degree difference have bigger absolute impact than you'd expect from the purely numerical value.

Nobody (well, almost nobody, I guess) considered it an explanation or model of climate change.

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