The truth is science has no idea
whether or not we are affecting the Earth in ways that we can actually measure.
Give it another 5000
years of history, then
you can compare the data. We still don't understand the cyclical histories of our Earth, let alone other planets, let alone
the forces that bind our Solar System or the rest of the cosmos.
As for the Moon having water under it's surface, I think it unwise for one to believe water in one form or another is not
abundant in the cosmos.
Our understanding and vision of what we are, how we are here and what will become is very short, let alone the cosmos and universe that surround us. Remember that little blue speck? We're insignificant in the grandest scheme of it all, though we'd like to think we aren't.