>...May take a while, but it will all return to where it came from...
Ron, if you'd taken a thermodynamics course you would have learned about entropy. Entropy is a one-way street. Boulders don't roll back to the top of a mountain, for example. And although there's plenty of water on the planet, all but a very small fraction is unusable seawater. Water in a mountain glacier is far more valuable than seawater; not only is it drinkable, it's also a an elevation where it can feed rivers. When a glacier disappears, it doesn't matter one iota that a vast amount of water is sitting in the earth's oceans.
Humans are increasing our planet's entropy at an exponential rate. Jeremy Rifkin wrote about it in the eighties and his predictions have been spot-on.
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Today's Featured Article - Tractor Hydraulics - The Basics - by Curtis Von Fange. Hydraulics was one of the greatest inventions for helping man compound the work he can do. It’s amazing how a little floor jack can lift tons and tons of weight with just the flick of a handle. What’s even more amazing is that all the principals of hydraulic theory can be wrapped up in such a small package. This same package applies to any hydraulic system from the largest bulldozer to the oldest and smallest tractor. This short series will take a look at the basic layout of a simple hydraul
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