Just think Dave, the rich people will have 100 gallons of water while we only have a 1/2 pint
Wasn't it a Twain story about the fishhooks in [gaa! I don't want to say esquimos anymore but don't remember their 'real' name] [PCness sucks!!]? Wealth sure is relative.
Barney I think that if photosynthesis creates oxygen then it would seem the theory is presumably correct! We 'know' the great herds of days gone by shaped the natural world around them to some degree. And humans are certainly changing things, if not man made global warming, then mass exterminations and changing the physical face of the planet at least.
Pete