The Microsoft co-founder, who has donated more than $50 billion to philanthropic causes since 1994, has in recent years focused his attention on climate change, which he considers one of the most acute problems facing humanity. He has spearheaded several initiatives on the research and development of clean energy. Bill Gates has called on US authorities to build new nuclear reactors in order to deal with climate change. Speaking at the Nuclear Energy Assembly, organised by a US nuclear trade industry association, the 65-year-old drew attention to the number of nuclear reactors in the country slated for retirement, noting that...