The Earth has survived many extreme changes and circumstances, including reversal of the magnetic poles, catastrophic collisions with metiorites and asteroids, extreme radiation bombardment from sunspot activity and other cosmic phenomena. Now we are faced with another set of dillemna. The effects of our own activity on this Planet. But, lets get it straight, who are we concerned about? The earth will heal itself no matter what we do so let's not fool ourselves that it's the Earth we're concerned about. It's ourselves and our future as human beings on his Planet.
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