Business Green: The US needs to diversify its energy mix to incorporate more renewables, reduce its reliance on both foreign and domestic oil, improve the resilience of its energy grid, better prepare for the impact of climate change risks, and make wider use of federal procurement to drive the development of low carbon technologies. Not the latest wish list from Greenpeace or the WWF, but a hard-hitting new report from an influential panel of retired US admirals and generals, which argues that the …