Name: Al Le Mar
Question - is it really true that there is roughly the same amount
of water on Earth today as there was when the dinosaurs roamed? What
about factors such as acid rain and global warming? Have they not
significantly affected the quantity?
Of course. You'll recall from high-school physics that mass is
conserved --- matter is neither created nor destroyed, except in very
small amounts in the middle of stars, which doesn't concern us here.
Given that we have a powerful reason to believe that the amount of
water remains constant -- the conservation of mass law -- we would
need to have a good, solid, plausible mechanism for the removal or
addition of water to even suppose that the total amount has changed.
I can't think of one.
I'm at a loss to understand why you suggested global warming and
acid rain. What ABOUT acid rain and global warming do you suspect
could change the amount of water on the Earth?
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Update: June 2012