Talk about strange bedfellows. Environmentalists have now found a new and unexpected ally: the US military.

The army, navy, air force and the marines have come out in support of the Green army with a bunch of retired generals and military types at the Center for Naval Analysis (CNA) putting out a report warning that ignoring climate change is a security risk. And part of the problem are those energy policies that have made the US so dependent on oil. It's time to develop alternative energy sources.

The report says: "US dependence on oil weakens international leverage, undermines foreign policy objectives, and entangles America with unstable or hostile regimes. Inefficient use and overreliance on oil burdens the military, undermines combat effectiveness and exacts a huge price tag-in dollars
and lives.

"US dependence on fossil fuels undermines economic stability, which is critical to national
security. A fragile domestic electricity grid makes our domestic military installations, and their critical
infrastructure, unnecessarily vulnerable to incident, whether deliberate or accidental.

"The market for fossil fuels will be shaped by finite supplies and increasing demand. Continuing our heavy reliance on these fuels is a
security risk. Regulatory frameworks driven by climate change concerns will increase the costs-both economic and geopolitical-of using carbon-based fuels. Destabilization driven by ongoing climate change has the potential to add significantly to the mission burden of the U.S. military in fragile regions of the world."

In other words, military leaders are warning that dependence on fossil fuels is making the world less safe.