DD> There is an extracter fan installed in the bin - it draws air
DD> down through the pan and shoves it up a "chimney". 

 And that works? (AMAZE). If you'd like to run your hand around your
computer box, you'll find that the "extractor" fan blows lots of extra
air out of all the little nooks and crannies, quite apart from out the
back like it's meant to do.

DD> Flushing toilets use incredible amounts of water (which makes a
DD> big difference when one has to catch every drop from the roof).

 Yair... if it's yellow, let it mellow; if it's brown flush it down.
It amounts to ten litres per person per day. In a metropolis, the use
per person is roughly 20-times that (200 litres per day).

DD> A dry composting toilet produces far less pollutants that must
DD> be disposed of. 

 Eh? What goes in, comes out. It doesn't matter if you compost with
e. coli it or use a different kind of bacteria to break it down. The
only difference with a septic tank is that it's designed to leak into
the soil, driven by pure water every time you flush. It's the same old
shit... unless being politically correct removes pollutants from what
otherwise is brown and smelly (well seasoned, with a touch of garlic).

Regards,
Bob
   

--- BQWK Alpha 0.5