Not sure why you think Hunga Tonga Hunga Haopai Eruption was largest ever, it was 12th It was big but a long ways from largest ever. The VIE scale is used to measure volcanos it is e VIE . Your volcano was 5.7 others like Yellow stone in US, 640,000 years ago, were 8. try to do some research before saying things.
Here are the biggest super volcanos that may have the ability to modify the world as we know it. They all are showing new activity if one of these erupts, I do not think global warming will be a big concern.
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