It is placed into "safe" mode while scientists attempt to fix the problem.[336] 8 October The IPCC releases its Special Report on Global Warming of 1.5ºC, warning that "rapid, far-reaching and unprecedented changes in all aspects of society" are needed to keep global warming below 1.5 °C.[337][338][339] Researchers report low-temperature chemical pathways from simple organic compounds to complex polycyclic aromatic hydrocarbon (PAH) chemicals.