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Since we know little or nothing about plate tectonics (still a theory)

There's where you're wrong. Plate Tectonics is not a "theory." Several things about moving plates (subduction, frequency of earthquakes at plate edges, etc.) have been empirically observed.

Fracking, and the technologies that enable it, are good for the country. The risks to the environment, and to the economy for that matter, are much smaller than the alternatives.

"There's where you're wrong. Plate Tectonics is not a "theory."

Title: Development of Plate Tectonics Theory

http://www.infoplease.com/encyclopedia/science/plate-tectonics-development-plate-tectonics-theory.html

source 2 title: The Origins of Plate Tectonic Theory .

http://www.visionlearning.com/en/library/Earth-Science/6/The-Origins-of-Plate-Tectonic-Theory/65

Source 3: What is Plate Tectonics ? - Live Science: Scientific News ... www.livescience.com/37706-what-is-plate-tectonics.html Cached Jun 23, 2013 · Plate tectonics is the theory that Earth's outer shell is divided into several plates that glide over the mantle

Need I go on? It is a theory, the science isn't "settled".

I will agree that the metrics you cited are empirical measurements.