The fight against climate change is being used by the government to regain the public's confidence in politics, the business secretary Lord Mandelson said today. "We are at a precarious time for mainstream politics in the UK. We can get cynical about politics in this country, or we can have a serious debate about what needs to be done to get our politics back on track and our economy back to growth," he said in a speech at the Policy Network event at the London School of Economics. "A positive politics of climate change depends on us deciding that politics works, that it is how we focus collectively on a different future, and in focusing on it, make it happen."