More and more we are starting to see elaboration of the idea that we --the people, can only be as healthy as our planet. That puts the responsibility you know where.
http://articles.mercola.com/si...
“Permaculture is an ecological design system for sustainability in all aspects of human endeavor. It teaches us how to design natural homes and abundant food production systems, regenerate degraded landscapes and ecosystems, develop ethical economies and communities, and much more. As an ecological design system, permaculture focuses on the interconnections between things more than individual parts.” Permaculture Institute
You start, of course, in your own back yard, where ever that back yard may be.
The key to understanding permaculture is being able to see wholes comprised of interconnections---not just the sum of its parts.