BBC NEWS | Science & Environment | Gore's tough message to leaders

Leaders will have to embrace tougher targets on reducing emissions if they want to prevent dangerous climate change, according to Al Gore.

Speaking here at the UN climate conference, the former US presidential candidate said the "sclerotic" politics of today had to change.

His speech was met with rapturous applause by thousands of delegates.

Friday's New Hampshire ice storm blog: Hundreds of thousands without power

Updated ice storm news will be posted at the top of this article in blog style.