“The path to sustainability is specific, and identifiable as well as measurable. There exists today 5.4 acres of bio-productive space per person on the planet. If we leave a meager third to the other 30 million species, we can use an average of 3.7 acres per person for our purposes. It’s simple . . .
Just Use Less Stuff!!!!”

 --Dr. Mathis Wackernagel,
co-creator of the ecological footprint concept