UPDATE: IMF downgrades the forecast for the global economy

The International Monetary Fund has downgraded its forecast for the global economy - trimming half a percentage point off its projection - now at 4.4 per cent. The IMF's First Deputy Managing Director, Gita Gopinath tells us the focus right now is on the world’s two biggest economies - the US and China - neither of which, the IMF believes, will be immune to the slowdown. India and Japan, by contrast, are forecast to buck the trend. Plus, Walmart has announced an investment in a vertical farming company. We discuss the merits of the concept with Leo Marcelis, professor of Horticulture and Product Physiology at Wageningen in the Netherlands.