Does anyone know of any free online lecture series for science topics related to permaculture (soil science, chemistry, ecology, etc.)? I'll share one which I just found and made me think of posting this. It's the complete lectures for a basic soil science class at a community college.
http://www.youtube.com/user/WWCCSoils#p/u/188/q_n0AvtQM5w 
.png)
