Climate change poses serious security risks for the European Union, ranging from sharper competition for global energy resources to the arrival of numerous “environmental migrants”, warns a report prepared for an EU summit this week.

“The core challenge is that climate change threatens to overburden states and regions which are already fragile and conflict-prone,” says the report, drafted by Javier Solana and Benita Ferrero-Waldner, the EU’s two highest-level foreign policy officials.