KATHRYN LURIE ACTOR Idris Elba and his wife Sabrina Dhowre Elba called for business and political leaders to provide more support to the world's poorest countries in the form of investment rather than aid. At the opening ceremony of the World Economic Forum (WEF) annual meeting in the Swiss mountain resort of Davos, the Elbas were both honoured for their work on environmental conservation, food security and climate change. The couple, who are Goodwill Ambassadors for the United Nations' International Fund for Agricultural Development, appealed to participants at the annual summit for fast financial support for people hit by food…