And how would we or any one else on earth know ...
Let's get rid of all of it!
Then, all vegetation will die!
Then, since the vegetation gives us oxygen and food, all herbivores will die and we will have trouble breathing!
But that's not a problem either because we won't have anything to eat....
Oh the beauty of it all...humans exterminated so the good old "Mother" Earth will never be abused again!