Accretionary Wedge #46, hosted this month by Knowledge Flocs asks the question: How has life or civilization been affected by geology or how has geology been affected by life? I pondered this question essentially for the whole month before sitting down tonight and writing this. I was out there on the Colorado Plateau a few weeks back, and I almost mindlessly snapped a picture that I didn't give a second thought to. It was part of the view from the Wahweap Overlook at Lake Powell on the border between Arizona and Utah, and I was snapping a series of shots to get sort of a panoramic record of the view.
Tonight it caught my eye. A coal-burning power plant on the shores of an artificial desert lake. What is the carrying capacity of this land? There are thousands of people living in the immediate vicinity, but there are lines of copper wire leading out like a web to literally millions of homes in the wider region, especially places like Phoenix or Las Vegas. Looking at the coal-burning powerplant is to realize that the present-day population is depending on sunlight that fell on plants 70 million years ago to survive. They are depending on water that used to exist only in a deep inaccessible canyon. And to propel their vehicles they import the remains of plankton and one-celled organisms that lived by trillions upon trillions 200 million years ago in oceans and seas that don't even exist on Planet Earth anymore. Their food in large part is grown in other states or other continents.
And we take for granted that we will be living here permanently. We barely ever give thought to the intricate web of connections and imported energy that keeps this civilization alive. What happens when a piece of the web breaks?
I ask in particular because of that white strip along the shoreline of Lake Powell. It's the bathtub ring of the reservoir. It doesn't look like much from my lofty perch, but that is a terrifying lake level if you are one of the watermasters responsible for providing an allotment of water needed to keep things going downstream. The Colorado is the most important source of water in this arid land except for groundwater, which is pretty much non-renewable and is being used up in many areas. The region has been suffering through a decade-long drought, and global warming is leading to changes that may intensify the droughts for the conceivable future.
There are limits.That is the effect of geology on human life in this region. There is only so much water, and there is only so much coal. And populations and societies are not stable. Some will last longer than others, but the changes will come. Will we know when the limits have been reached and act? Or will we be caught off guard, and realize we need to move someplace else? And where will we go?
I'm appalled when I hear politicians say that the most important questions facing our generation have to do with the marriage of the gays and how important it is to de-fund Planned Parenthood.