Warren Buffett, the world's fourth wealthiest person with a net worth of 88-point-six billion U.S. dollars,… has pledged some 3.6 billion dollars worth of shares in his Berkshire Hathaway conglomerate to five charities.<br />The charities include one run by Microsoft co-founder Bill Gates and his wife Melinda Gates.<br />The present will be the 88-year-old's biggest donation ever, topping the 3.4 billion dollars he gave away last summer.<br />Buffett has now given more than 34.5 billion dollars to charities, continuing his 2016 quest to gradually donate over 99 percent of his fortune to those in need.<br />
