5 Key Takeaways From the Latest Climate Change Report

The Intergovernmental Panel on Climate Change calls for a dramatic shift from fossil fuels, aiming to influence world leaders to take concrete steps.

Protecting the planet will require a dramatic shift away from fossil fuels, the report from the Intergovernmental Panel on Climate Change emphasizes.

The release was timed for political impact, arriving weeks before international negotiators meet in Lima, Peru, to start forging a new strategy on climate change.

"Science has spoken. There is no ambiguity in their message," United Nations Secretary-General Ban Ki-moon said in a news conference this morning in Copenhagen. "Leaders must act; time is not on our side."

The Fifth Assessment Synthesis Report, as it's called, pulls together the conclusions of three IPCC working groups, which issued reports over the past year on the underlying science, the impacts, and the ways to address climate change.

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