Glenn van Zutphen and award-winning author Neil Humphreys in conversation with Rob Salisbury, CSP, Chief Strategy Officer, SRI Global, about his personal mission to clean and green Singapore and how he is encouraging everyone to do their part to clear their trash. 

Glenn van Zutphen and award-winning author Neil Humphreys&nbsp;in conversation with Rob Salisbury, CSP, Chief Strategy Officer, SRI Global, about his personal mission to clean and green Singapore and how he is encouraging everyone to do their part to clear their trash.&nbsp;