Lyric discussion by gwilikers6 

Cover art for Dawn Patrol lyrics by Megadeth

I think it's about the aftermath of a nuclear war.

@gwilikers6 it’s obviously about the dangers of fossil fuels. Not only mentioning the greenhouse effect, but the line “I can only laugh, when I read our epitaph” hits at a very ironic death of the human race and what could be more ironic then being killed by the one thing we depended on so much.