European governments have been told to plan for an era of conflict over energy resources, with global warming likely to trigger a dangerous contest between Russia and the west for the vast mineral riches of the Arctic.

A report from the EU's top two foreign policy officials to the 27 heads of government gathering in Brussels for a summit this week warns that "significant potential conflicts" are likely in the decades ahead as a result of "intensified competition over access to, and control over, energy resources".

The seven-page report, obtained by the Guardian, has been written by Javier Solana, the EU's foreign policy supremo, and Benita Ferrero-Waldner, the commissioner for external relations. It predicts that global warming will precipitate security issues for Europe, ranging from energy wars to mass migration, failed states and political radicalisation.

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The report warns of greater rich-poor and north-south tension because global warming is disproportionately caused by the wealthy north and west while its impact will be most catastrophic in the poor south.

The officials single out the impact of the thawing Arctic and its emergence as a potential flashpoint of rival claims, pointing to the Kremlin's grab for the Arctic last year when President Vladimir Putin hailed as heroes a team of scientists who planted a Russian flag on the Arctic seabed.

Developments in the Arctic had "potential consequences for international stability and European security interests".

"The rapid melting of the polar ice caps, in particular the Arctic, is opening up new waterways and international trade routes," the report notes. "The increased accessibility of the enormous hydrocarbon resources in the Arctic region is changing the geostrategic dynamics of the region."

The report also stresses the volatility of the regions that hold large mineral deposits and predicts greater destabilisation in central Asia and the Middle East as a result of global warming. The report comes as the issue of energy security begins to loom large on the agenda of western policymakers. A summit of Nato leaders in Bucharest next month will discuss the problem for the first time, while a new manifesto for a radical overhaul of the western alliance moots the possibility of Nato being used "as an instrument of energy security".

"There will be a discussion of these new security risks, including energy," said a senior Nato diplomat. "We will try to find areas where Nato can add value."

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