Humans have caused 1.5 °C of long-term global warming according to new estimates

On the order of 100-200 trillion USD. Which is roughly 100-200% of global yearly GDP. Or 2-5% of yearly GDP until 2050. This could well be provided by printing money at all the federal reserve banks.

This investment will likely bring in a positive return on investment because it reduces the negative climate impacts.

Without such investments the downstream costs in climate change adaptation will be very expensive

Is that the cost for the duct tape needed to plug the airvents of data centers all over the world? The whole AI hype is driving energy consumption through the roof and when you see the companies behind the hype eye having their own nuclear power plants you know they are going to outscale cities housing millions in waste heat production.