A slow recovery among nations using the euro is holding back the global economy, the Organisation for Economic Co-operation and Development has said.
The market economy group downgraded its growth forecast for most big economies.
Conflicts in Ukraine and the Middle East and the referendum on an independent Scotland are areas of risk and uncertainty, it said.
Its 2014 estimate is a 0.8% increase in the eurozone economy for 2014, compared with a forecast of 1.2% made in May.
The UK's forecast was cut by 0.1 percentage points to 3.1%.