Humans are never going to destroy the environment, only themselves.

But I'm sure the environment can adapt too. I mean, it's not like anyone cared about preserving species and ecosystems before we arrived, catastrophic events happened, population of animales died and arose, for billions of years. Billions.

So we're the latest catastrophic event, big deal. The earth will adapt as it always has and at least we can try to discuss our impact, unlike an asteroid or a syberian forest fire.

Earth will only be habitable for less than 1 billion more years. We do not have any evidence of abstractly intelligent life forms outside of human beings. There is not enough time left for another intellect to evolve.

Like it or not, if we do not successfully become a space-faring species, all life known in the universe will be wiped out.

>all life known in the universe will be wiped out.

Is that a problem for you?

And why would it not come to existence again somewhere eventually?

Its interesting to think about such stuff but it really should not have an impact on decisions we make today because it just not possible to affect a so distant future (thousands of years) in a meaning full way.

Just imagine humans 2000 years ago what could they have possibly done that would have had a positive environmental effect today. And that's just 2000 years ago.

If you apply this to mining the see floor. Do you seriously think that if we today decide that human should not do this that it wont be done in 2000 years? I think is far more likely it just pushed a little back in time an insignificant little, maybe one human life maybe even two who knows but in 4021 no one cares if it started in the year 2021 or 2121 that's for sure.

Also if you want our species to become multi planetary then the only logical thing to do is to use all resources available achieve this as soon as possible. If we used up the resources or have way more humans and no spear resources no one is going to achieve it anymore.