Wayne Weiseman will be in Ft. Worth, TX to teach the PDC. It will be facilitated in two long weekends in April and May. I took this course last year, and really enjoyed it and learned a lot. http://www.dfwpermaculture.com/
If you open the box, you will find Heisenberg strangling Shrodenger's cat. And waving this tiny ad:
A rocket mass heater is the most sustainable way to heat a conventional home