[montecarl]

Its cool our energy problems are being solved in two directions at once. We are (slowly) making better energy storage and generation devices. At the same time many of our energy needs go down by the rapid decrease in energy needed to power the electronics. It would be cool to see a graph of the watts/lumen efficiency of light bulbs over the last 50 years and of the joules/operation of CPUs.

[tdaltonc]

Manhour/lumen is the only measure I know of that captures all of the elements of economic growth and can be estimated for every culture and back to before the development of spoken language.