“A target for renewable energy is crucial to provide certainty that can ensure cost-effective investments in energy systems that will strengthen the internal market for energy,” the group of energy and environment ministers say.

They made the call in a letter to Connie Hedegaard,  the EU commissioner for climate action, and Gunther Oettinger, commissioner for energy.

The letter is signed by ministers from Austria,  Belgium,  Denmark,  France,  Germany,  Ireland,  Italy and Portugal.