Very interesting, we need an index like this for every industry. Mainstream economics do not factor in the external costs to people and the environment, which DO have long-term value. Cropland destroyed from overproduction means indefinitely lost supply.
More importantly though, will anyone use it? I feel this index could be utilized by major manufactures to "Greenwash" buyers into thinking they are actually responsible companies. Certainly has been done before.
PowderHound and TreeNinja