As the World Economic Forum calls for action from all sides to tackle poverty, disease and the lack of education, some answers to the world's challenges are already emerging from boardrooms around the globe. One trend is for companies to begin working together, alongside governments and development agencies, on problems too big for any one group to handle alone, such as the Aids pandemic. [refers to Rio Tinto, Anglo American, SC Johnson, Deutsche Bank, Accenture, Deloitte Touche Tohmatsu, PricewaterhouseCoopers, Shell, Citigroup, Banamex (part of Citigroup)]