Matt Damon
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Davos 2014: Matt Damon on 'unnecessary' unclean water deaths

23 January 2014 Last updated at 22:08 GMT

Actor Matt Damon says the number of deaths from lack of access to clean water and sanitation is "completely unnecessary".

Earlier this week, the 43-year-old received an award for his social, environmental and humanitarian work, including founding with Gary White.