Tbear
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gas is taken from most big landfills . and gas from sewage works powers motors that drive generators and supply the mains electric system.
this sort of thing is what i liked about working in the waste industry. had several trips away in uk and abroad because i was interested in the workings . all paid for by the company i worked for.
i also pop into works in africa and spain etrc when abroad for awhile . amazing what good work is being done in many places . the western world as we know it is backwards in time compared to many countries .
the desalination plants in africa are fantastic . in many places they are turning the sahara back into plantation land .
I can't see any evidence of it happening in the local ones but one does seem to have ventilation pipes coming out open to the air. You should see the water that used to come out of the bottom of it as well. Not much seemed to grow in it.
Richard