Many people talk about saving the world.
However, does the world need saving?
Even if we detonate every nuclear device that exists the world will still be here. We will just have set the clock back a few million years in Earths history. It is said that bacteria and cockroaches will survive nuclear explosions.
Even if genetically modified organisms render all staple crops inedible. Life will go on. We will just have played with evolution by artificially mutating an organism and put the clock forward a few million years.