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Mark Zuckerberg, the founder and chief executive of Facebook, was the US' biggest charity donor in 2013, according to a list of publicly-available donations.

Mr Zuckerberg (29) alongside his wife Priscilla Chan, gave $990m (€725m) to the Silicon Valley Community Foundation.

The donation, made up of 18m Facebook shares, accounted for almost a third of the $3.4bn that America's wealthiest philanthropists – those who gave more than $100m – donated in 2013.

This total was still down in comparison to the year before. Around $5bn was donated by the US's most wealthy philanthropists in 2012, although this included $3bn given by investment tycoon Warren Buffett to his children's foundations.