The Stuff We Use.

Earth Day inevitably inspires a re-assessment of our economic life; this remains the only thing about Earth Day that I respect. A few months ago, I was musing about phosphorous, food, and the remains of this cycle, suggesting that we might have to re-use what our bodies produce. And in the wake of Earth Day, Reason Magazine suggests that not just phosphorous, but a host of substances might become too costly due to current use:

“Is it realistic to predict that knowledge accumulation is so powerful as to outweigh the physical limits of physical capital services and the limited substitution possibilities for natural resources?” In other words, can increasing scientific knowledge and technological innovation overcome any limitations to economic growth posed by the depletion of non-renewable resources?
The debate over peak oil is heavily politicized, so let's set it aside and test the idea of imminent resource peaks and their consequences for economic growth on three other non-renewable resources: lithium, neodymium, and phosphorus.

 The solutions are:

• Reduce the use of Neodymium by putting AC-Induction motors in our Priuses instead.
• Re-use materials to make zinc-air or metal-air batteries instead of lithium.
• Recycle the phosphorous in our waste with NoMix toilets and improve the efficiency of fertilizer.

The key element to remember is the one truly re-usable resource: the human mind.