September 9, 2012

You are currently browsing the daily archive for September 9, 2012.

Geologists have an informal name for the history of human influence on the Earth. They call it the Anthropocene. It makes sense. We have been raiding the earth for its contents, and polluting its atmosphere, land and oceans for as long as we’ve been here, and it shows. By any objective perspective other than our own, we are a pestilential species. We consume, waste and fail to replace everything we can, with  little regard for consequences beyond our own immediate short-term needs and wants. Between excavation, erosion, dredgings, landfills and countless other alterations of the lithosphere, evidence of human agency in the cumulative effects studied by geology is both clear and non-trivial.

As for raiding resources, I could list a hundred things we’ll drill, mine or harvest out of the planet and never replace — as if it were in our power to do so — but instead I’ll point to just one small member of the periodic table: helium. Next to hydrogen, it’s the second lightest element, with just two electrons and two protons. Also, next to hydrogen, it is the second most abundant, comprising nearly a quarter of the universe’s elemental mass.  It is also one of the first elements to be created out of the big bang, and remains essential to growing and lighting up stars.

Helium is made in two places: burning stars and rotting rock. Humans can do lots of great stuff, but so far making helium isn’t one of them. Still, naturally, we’ve been using that up: extracting it away, like we do so much else. Eventually, we’ll run out.

Heavy elements are also in short supply. When a planet forms, the heaviest elements sink to the core. The main reason we have gold, nickel, platinum, tungsten, titanium and many other attractive and helpful elements laying around the surface or within mine-able distance below is that meteorites put them there, long ago. At our current rate of consumption, we’ll be mining the moon and asteroids for them. If we’re still around.

Meanwhile the planet’s climates are heating up. Whether or not one ascribes this to human influence matters less than the fact that it is happening. NASA has been doing a fine job of examining symptoms and causes. Among the symptoms are the melting of Greenland and the Arctic. Lots of bad things are bound to happen. Seas rising. Droughts and floods. Methane releases. Bill McKibben is another good source of data and worry. He’s the main dude behind 350.org, named after what many scientists believe is the safe upper limit for carbon dioxide in the atmosphere: 350 parts per million. We’re over that now, at about 392. (Bonus link.)

The main thing to expect, in the short term — the next few dozen or hundreds of years — is rising sea levels, which will move coastlines far inland for much of the world, change ecosystems pretty much everywhere, and alter the way the whole food web works.

Here in the U.S., neither major political party has paid much attention to this. On the whole the Republicans are skeptical about it. The Democrats care about it, but don’t want to make a big issue of it. The White House has nice things to say, but has to reconcile present economic growth imperatives with the need to save the planet from humans in the long run.

I’m not going to tell you how to vote, or how I’m going to vote, because I don’t want this to be about that. What I’m talking about here is evolution, not election. That’s the issue. Can we evolve to be symbiotic with the rest of the species on Earth? Or will we remain a plague?

Politics is for seasons. Evolution is inevitable. One way or another.

(The photo at the top is one among many I’ve shot flying over Greenland — a place that’s changing faster, perhaps, than any other large landform on Earth.)

[18 September...] I met and got some great hang time with Michael Schwartz (@Sustainism) of Sustainism fame, at PICNIC in Amsterdam, and found ourselves of one, or at least overlapping, mind on many things. I don’t want to let the connection drop, so I’m putting a quick shout-out here, before moving on to the next, and much-belated, post.

Also, speaking of the anthropocene, dig The ‘Anthropocene’ as Environmental Meme and/or Geological Epoch, in Dot Earth, by Andrew Revkin, in The New York Times. I met him at an event several years ago and let the contact go slack. Now I’m reeling it in a bit. :-) Here’s why his work is especially germane to the topic of this here post:  ”Largely because of my early writing on humans as a geological force, I am a member of the a working group on the Anthropocene established by the Subcommission on Quaternary Stratigraphy.” Keep up the good work, Andy.