Avoiding dangerous climate change is possible, technologically and economically. That is one of the main takeaways from the report released Tuesday by the Intergovernmental Panel on Climate Change (IPCC) on cost-effective ways to mitigate climate change. That report is the third of four constituting the Fifth Assessment Report (AR5) of the IPCC. The first, on the science behind climate change, was released in September 2013; the second, on the current and future impacts of climate change, was released earlier this month. A synthesis report is set to be published in October.