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CO2 did increase a lot. The ratio of CO2 in our atmosphere got up by more than 40% since 2 centuries ago. And that's despite effects which slow down the CO2 increase, like absorption by the ocean.

Source: https://www.co2levels.org/

edit: fixed increase ratio from 1800 to now.

1 comments

It hasn't tripled; we've gone from about 280 ppm to about 420 ppm. That graph's y-axis doesn't start at zero.

(That isn't to say that 420 ppm isn't really bad.)

You're right. My tired brain bugged when seeing 30% lower than today.

That's what's so striking. For most other global warming phenomena, the actual change recorded to date isn't that big. But for CO2, it's huge.