UK Foreign Secretary David Miliband and his brother, Climate Change Secretary Ed Miliband are sounding the alarm that a climate deal in Copenhagen in December may fall apart unless countries get their act together. 

David Miliband told reporters in London that the complexity of negotiations and disputes between industrialized and developing nations over cuts to emissions threaten to scupper a deal.

"The deal the world needs in Copenhagen is now in the balance," he said. "There's a real danger the talks scheduled for December will not reach a positive outcome, and an equal danger in the run-up to Copenhagen that people don't wake up to the danger of failure until it's too late."

Here is David Miliband explaining some of the international security risks of unabated global warming.

That's his brother to the left. The two are taking this presentation to a number of European cities this week and are in the midst of a big media push. All the power to them.