A million years from now maybe life will have evolved into forms that make use of those things that we today consider to be pollution. It's pollution to us because we are not evolved enough to make use of it.

What does life do? It adapts to its environment. Those that cannot adapt, die. 90% of all life forms that ever existed on Earth are now extinct. What's left is the life that successfully adapted and became what we see today.

Some more will die, some more will adapt, and a million years from now the world will be completely unrecognizable to anyone alive today. Will it be a better world, or worse? I don't know and neither do you!