The European Union (EU) has been of help to Nigeria in diverse ways, including humanitarian and trade relations, President Muhammadu Buhari has said. The President spoke Tuesday at State House, Abuja, while receiving in a farewell audience, the Ambassador/ Head of the EU Delegation to Nigeria and ECOWAS, His Excellency Ketil Karlsen. He appreciated the fact that the EU remains the largest trading partner with Nigeria, while members of the Union equally remain the largest investors. President Buhari thanked the outgoing Ambassador for facilitating the visits of French and German leaders during his tour of duty, noting that it was during Prime Minister Angela Merkel’s visit that the door to a relationship with Siemens of Germany on power was opened.