Note: At the beginning of the interview, Luisa states rough numbers on the decline of Arctic sea ice extent and thickness. Here are the exact ones: Sea ice decline: In 1979, 7.05 million km2 of the Arctic ocean were covered at the end of the melt season (“minimum extent”) by sea ice. In 2020, this area had decreased to 3.92 million km2 (More information and animations: https://climate.nasa.gov/vital-signs/arctic-sea-ice/) Sea ice thickness: Over a time of six decades, between the pre-1990 period and the recent years (2011-2018), the average thickness near the end of the melt season decreased from 3 m to 1 m (Kwok 2018, https://doi.org/10.1088/1748-9326/aae3ec)”