Unicorn Poop

Let's say we found the ultimate clean, cheap, and abundant energy source. Freely available, widely distributed, and with no toxic effects when used. I call this the "unicorn poop" scenario.

In the current mainstream approach to sustainability, such a scenario would be an ecological disaster. Why? Because we use energy to do things. To make things, to alter our surroundings, to claim more Earth for ourselves. We don't just need clean energy, we need a limits framework for managing the resources of our one globally-shared Earth system.