I don't suppose anybody would make up a song about ice cubes melting in a glass of water because, of course, the water level eventually drops slightly (Ice occupying more space than its equivalence in water, which is why ice floats). Since the polar ice cap is floating on the water, which is why submarines sail under it all the time, if the polar ice cap melts, we should actually have lower tides not higher ones. Maybe they were thinking about glaciers...

But oh, that's right, this was heard on Radio Pacifica in LA in the 70's... scene of some of our best higher order thinking. Do you think they smoked too many joints without their helmets? Not enough? Would they have been closer to reality by scoring Johnny Walker Red?

Truth be told, I wish you well, I'd love to see the words myself, with the chords, if possible. I could sit back and sing it while watching muted reruns of "On the Beach".