EU aid for refugees in Turkey worth billions of euros is not sustainable, according to a report by the European Court of Auditors (ECA) released on Wednesday. Since 2016, the EU has funnelled a special €6 billion ($6.4 billion) in humanitarian and development aid to Turkey as part of a pact to curb flows of people seeking to reach the bloc. The ECA on Wednesday released a report into how the funds are being spent and whether the financed projects in the country, which currently hosts more than 4 million registered refugees out of a total population of around 87 million people, will be sustaina…