Energy-strapped Turkey has announced the discovery of a vast natural gas field in the Black Sea containing 320 billion cubic metres of natural gas, which could start producing by 2023. Making the announcement, Turkish President Recep Tayyip Erdogan called the find ‘historic’ and vowed to step up energy exploration in Aegean and eastern Mediterranean waters that Greece says it controls. "Turkey has made its biggest natural gas discovery," said Erdogan ...