UN Climate Report Relevance Debated Amid Rollout

Can a long-awaited international global warming report keep up with a fast-changing climate?

An iceberg tower in the Labrador Sea, Canada.

The long-awaited Intergovernmental Panel on Climate Change's (IPCC) first report in six years arrives this Friday, a high-profile summary of global warming's scientific status certain to influence attempts to address the threat of a warming world. It also faces criticism before it even gets out of the gate.