It's about posterity not austerity, said Climate Change Secretary Ed Miliband at the Fabians Road to Copenhagen conference today.
What brings it home to people is experiences, rather than statistics, he said, pointing to the 2003 heatwave and recent flooding as examples.
"How do you want to be remembered by history? Do you want to be remembered as the last generation that didn't get climate change," he asked.
Partly this can be about saying this can be part of a better quality of life.
"I think that what's very important to realise in this is if we leave this as a debate which is about numbers, finance and managerialism I think we are pretty sunk. We have to make it a much bigger argument about the kind of society we believe in."