==== composting stuff ====
  * about the [[wormfarm]] and [[how_the_worm_farm_works]]
  * coffee grounds; rich in Nitrogen, close to pH neutral (~6.5) >> http://www.sciencedaily.com/releases/2008/07/080707171641.htm
  * [[Bokashi]] fermentation method claims less CO2 and more nutrients output than compost.