The vast majority of elaborated pathways point to increased risk; for example, there is concern that climate change may alter the fate and transport of carcinogenic polyaromatic hydrocarbons  and increase mobilisation of carcinogens such as bromide , persistent organic pollutants  including polychlorinated-biphenyls that have accumulated in areas contaminated by industrial runoff  and radioactive material . Exposure to these known carcinogens can occur through multiple environmental media and can be increased by climate change, for example through increased flooding related to extreme precipitation events and mobilisation of sediment where carcinogens have accumulated . In addition, there is concern that changes in ultraviolet light exposure related to shifts in precipitation may increase the incidence of malignant melanoma, particularly for outdoor workers . Other harmful pathways include migration of and increased exposure to liver flukes, which cause hepatobiliary cancer  and the introduction of infectious diseases such as schistosomiasis that increase cancer risk due to climate-related migration . Increased exposure to carcinogenic toxins via multiple pathways is also a concern. Aflatoxin exposure, for example, is expected to increase in Europe , India , Africa  and North America . Other carcinogenic toxins originate from cyanobacteria blooms , which are projected to increase in frequency and distribution with climate change .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report