Atheists are neither logical nor rational.
It would be completely irrational to selfishly consume the Earth's limited resource if you truly believed that life has no meaning and the eventual death of the universe will undo all your work.
The fact that atheists don't kill themselves en masse proves without a shadow of a doubt that they all cling on to some small hope that there's something more to life, something going to happen after they die, thus they are either irrational or illogical.
>p.s. that shadow of a doubt that lingers in the back of your mind is the Holy Ghost calling out for you to find Jesus, you doubt but you know deep down in your heart that it's true; you can only see this message if you're just beginning to believe, keep going