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Name: Al Le Mar
Status: Student
Age: 20s
Location: N/A
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Question:
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?



Replies:
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?

Grayce



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