Through the co-ordinated efforts of government and public action, wartime Britain achieved feats that would be considered extraordinary today. In just six years, British homes cut their coal use by 25% (a total of 11m tonnes) and their use of personal motor vehicles by 95% (public transport use increased by 13%). So could some Blitz spirit be the answer to climate change? Green MP Caroline Lucas thinks so, and has launched the New Home Front, a project that aims to learn the lessons of World War II-era Britain and apply them to the new global crisis. Think of how relevant some of those wartime posters sound today: "Is your journey really necessary?"  Lucas is collating ideas from those who lived through the war on ways the country can face the new realities of changing climate - whether that's growing our own food, eating seasonally and locally, or creating a new national bank. "If we are to overcome the  climate crisis," says Lucas, "we must move on to the equivalent of a war-footing, where the efforts of individuals, organisations, and  government are harnessed together - and directed to a common goal."  To join the New Home Front, visit newhomefront.org