growth precarious global economy uncertain international monetary fund and the world bank kick off their annual spring meetings with warnings to the world. also coming up after months of disagreements the e.u. has green lighted trade talks with the us setting the stage for the real challenge convincing washington to agree to a deal. and it's said to be one of the biggest oil refineries in the world built by the richest man in africa but will it be good for nigeria our correspondent funny went to find out. welcome to the business i'm john nelda and in berlin good to have you with us it's a recurring refrain by now but with undiminished urgency i don't use conference marking the start of their annual spring meetings the international monetary fund