According to Jean-Claude Juncker.

The stronger euro against the dollar may slow the European economy. The biggest growth in the last 14 months of the EU vs. the U.S. currency would hit the European exports and could negatively affect the recovery of the economy, states Jean-Claude Juncker.

Last Thursday the euro cost 1.49 dollars, an increase by 18 percent since March this year. This figure is still lower than July 2008 when the euro reached $1.6.
According to latest data of the European statistical office Eurostat, euro zone trade with the rest of the world in August noted a deficit of 4 billion euros, and last month achieved a record surplus of 12.3 billion euros.