a worker 's death(passive) caused bya worker 's death
the main source of environmental contamination(passive) caused bythe main source of environmental contamination
of readily biodegradable material ... and is a good base substrate for biological processes , such as anaerobic digestion , since it contains buffer capacity and a wide variety of nutrients ( González - Fernández and García - Encina 2009 , Rodríguez et al . 2011is composedof readily biodegradable material ... and is a good base substrate for biological processes , such as anaerobic digestion , since it contains buffer capacity and a wide variety of nutrients ( González - Fernández and García - Encina 2009 , Rodríguez et al . 2011
Master ( Angelo Rossitto ) who controls the methane supply ,(passive) created byMaster ( Angelo Rossitto ) who controls the methane supply ,