How far would you go to save the planet?

Who said they need to die willingly?

ETA:

To answer with a bit more precision... If I was to have that amount of power, I don't know for sure. What I don't know for sure, is the HOW. I'd look at it like I look at certain video games. Take Age of Empires for example... Let's say I'm getting my butt kicked, and my pop limit is reached. I've got an excess of villagers farming, mining, etc. All well and good. But not in the moment, not for my survival. Boom, they're gone. Thanks for the gold, wood, and food, but I have bigger things going on. I need military units. Peace can come later.

A shoddy example maybe, but the gist is there.

Irl setting, Idk, Irl I'd prefer to find a way where we can all get along.

But, reality.