Hold it!. This topic is going nowehere. The original topic was concerned with the minute amounts of medicines, antibiotics, estrogens, and other chemicals that have found their way into the undergroung waters. That's what seems to scare truthseeker, a person easily scared, in my opinion. Remember "Little Chicken", whern an accorn fell from an oak and struck his head? He started yelling: <b>"The sky is falling!, the sky is falling!"</b>. And people like Nelson believed him... As for the polar ice caps melting: if the Arctic ice melts (a wild assumption and an impossible event) the oceans will not rise a millimeter. When floating ice melts down, it returns the same <B>VOLUME</B> of water it took when it froze. that's why the icebergs float. they are less dense (More volume at equal weight) than surrounding water. Result: levels do not vary. Simple physical laws you have learned at school (I hope). The amount of water in Earth is the same one that existed at the time of the planet's formation. No more, no less (except for infinitesimal amounts of water dissociated by industrial processs to make hydrogen --counteracted by the formation of water by some other industrial processes). If our tap water gets polluted (and that claim is highly doubtfull) that's another matter. Drinkable waters in poor countries has been lousy since the formation of Earth and the ruling of politicians. So, there seems to be no solution for Nelson's concerns. So, let's go out, and have lots of fun before the planets collide!