[The One and Only...]

You seem to forget something. I don't care about the ecosystem.

I only care about the human race.

I would love to see your opinions backed up by scientific claims. If we can eliminate every undesirable species, keep some for food, and keep plants so as to maintain producers, the ecosystem would be perfectly fine - aside from the fact the the majority of earth would be industrialized.

You do realize that it is not so far off that we will need the earth at all, right? Soon (if not now), we won't even need soil to keep plants.

That is not some college kid's claim, that is just common sense. Even you must realize that, considering our population growth, we will need to leave this planet or go to sea after another century or so.