Farmers in sub-Saharan Africa could earn about two billion U.S. dollars more every year if industrialised countries dropped their trade-distorting agricultural policies and opened their markets to goods from the developing world, says the International Food Policy Research Institute. The present round of world trade talks - called the Doha round - are meant to kick-start the economic development of the developing world. However, the talks have stalled because of differences between the developing world and the industrialised countries over trade in agricultural goods. World trade ministers are scheduled to meet in Cancun, Mexico on Sep. 10-14, to see if they can find a way out of the impasse.