Would 10% of people dying to solve global warming be justifiable?

I usually don't get nightmares. If there's a monster chasing me I'm pretty aware it's not real, I find giving it a hug often helps.

Every now and again though my brain does actually land on a way to torture me...

I dreamt I had found a way to not only reverse global warming but keep the temperature regulated indefinitely. Only thing was, although all the animals would be fine, I had just found out that 10% of all humans would die over a 20 year period. The largest amount would die in the first year with successive years seeing shrinking amounts of deaths.

There was only a small window of time to set it in motion as it was related to a one off cosmic event, and everyone knew I was working on this so when 1 in 10 people ended up dying, everyone who lost someone would know it was my fault.

What would you do? 😭