Kenyan architects win prestigious category award at World Architecture Festival . `` La Vall d'en Joan '' project turned rubbish dump into architectural landscape . over 100 meters of rubbish was dumped at the site near Barcelona for 2008 . LONDON , England ( CNN ) -- Water from site purified for use in irrigation , bio gas used to create electricity .
Kenyan architects win prestigious category award at World Architecture Festival . `` La Vall d'en Joan '' project turned rubbish dump into architectural landscape . over 100 meters of rubbish was dumped at the site near Barcelona for 2008 . Water from site purified for use in irrigation , bio gas used to create electricity .