The US is falling behind other countries in advanced energy technologies, threatening national security and undermining its global influence, former generals and admirals in the US military are warning the Trump administration. The CNA Military Advisory Board, a Virginia-based think-tank, argues that the US should “take a leadership role in the transition to advanced energy” by stepping up research and development of technologies such as renewables, nuclear power, energy efficiency and electricity storage. The military officers’ conclusions, which were due to be presented to US government officials on Tuesday, follow warnings from businesses that President Donald Trump’s decision to withdraw from the Paris agreement on climate change could undermine the country’s advanced energy industries. Many analysts have discussed the geo-political and national security significance of the shale revolution, which has cut US energy imports and turned the country into an exporter of gas to the Middle East and crude oil to China. CNA’s former military leaders argue that the advanced energy revolution, driven by the plunging cost of renewable generation and battery storage, also has important consequences for US strategy.