6 Min Read ISTANBUL (Reuters) - Some of Turkey’s biggest banks are reluctant to finance President Tayyip Erdogan’s planned Istanbul canal due to environmental concerns and the investment risks hanging over the massive construction project, four senior bankers told Reuters. FILE PHOTO: Real estate agent Murat Ozcelik talks during an interview with Reuters at his office in Kayabasi district in Istanbul, Turkey, April 16, 2018. REUTERS/Osman Orsal/File Photo Two of the sources said a global sustainability pact that six of Turkey’s top banks have signed was a barrier to funding the Kanal Is...