> the change and result are both possibly good and bad, but we don't really know yet.

I'm no scientist, but I believe the current ecological disaster effecting the UK's largest lake may be an example of the type of bad outcome we could expect to see more of.

https://www.theguardian.com/environment/2024/feb/19/like-the...

It appears that a large algal bloom might be the immediate cause. Apparently algal blooms benefit from higher CO2 levels.

https://www.epa.gov/nutrientpollution/climate-change-and-har...

I can't find it now, but I do remember reading some theory that previous extinction events on earth were driven by large amounts of organic matter breaking down anaerobically (i.e. underwater) which leads to a huge increase in some pretty nasty gases in the atmosphere. There have (apparently) even been times when some of the world's oceans were effectively large swamps.

Edit: My mistake, I didn't read about what I mentioned in that last paragraph - I heard it on youtube.

https://www.youtube.com/watch?v=8eM1aakTzMw

To give the general gist of what's covered in the above video/interview with paleobiologist Peter Ward:

03:00 - We need a little bit of CO2, but it’s easy to have too much CO2

04:20 - Rare Earth: Why Complex Life is Uncommon in the Universe (co-written with Dan Brownlee)

04:40 - Excessive heat and mortality

05:12 - Volcanic activity responsible for past CO2 spikes

05:40 - Previous mass extinctions

05:57 - Non-animal mass extinctions

07:18 - Uneven atmospheric heating

and much more...

Well worth a listen if you have the time.