[fastball]

That's not a great rebuttal, as you will always die regardless, so all of the things you just mentioned would happen even if you didn't kill yourself.

Killing yourself is absolutely the best way to help the world if your biggest concern in life is global warming and the only way you know how to help is by limiting your own consumption / CO2 production.

Of course, you shouldn't kill yourself, because there are many other, much better ways to help the environment than limiting personal consumption.

Arguably the best way would be to help push for more nuclear power.