Whooooaaah, easy there Tiger, you worship the Climate goddess, precluding atheism.
Let's see ... you think that it is foolish to believe that a great flood occurred in which the waters prevailed 15 cubits, and that extreme weather killed all life on the planet, because that's impossible ... but that we are foolish to not believe that in 30 years, or by the end of the century, that the world's waters will prevail 15 cubits, and that extreme weather will kill all life on the planet, because that is an absolute certainty once we reach the "tipping point", and it might already be too late.
You're no atheist; you're a fire and brimstone preacher of a WACKY Marxist religion based on HATRED and intolerance, that seeks to destroy the world economy and quash any and all happiness in the world.
On a side note, no matter how you respond, you lose. If you admit to your profound devotion to your Climate faith, you lose your title of "atheist"; if you disavow your religious Climate beliefs, you acknowledge the religious nature of the Climate faith, which you fight tooth-and-nail to keep concealed (even though everyone already knows).