July 2023 has been confirmed as the hottest month ever on Earth. A combination of heatwaves across the Northern Hemisphere, unseasonable warmth in parts of South America and Antarctica, and global sea surface temperatures around 0.51°C above the 30-year average, meant it broke all previous records.

Climate scientists are now poring over the data, including Prof Jim Skea, the newly-elected chair of the Intergovernmental Panel on Climate Change (IPCC). He joins presenter Graihagh Jackson to discuss how worried we should be, and the challenges ahead as he takes up the most important role in global climate science.

Producer: Ben Cooper