These factsheets about human impacts on sharks and rays, authored by Simon J Pierce and Ryan Charles, address the five most important threats to sharks and rays, (1) overfishing, (2) climate change, (3) pollution, (4) tourism, and (5) habitat modification.  The fact sheets have been prepared for CMS by the IUCN Species Survival Commission (SSC) Shark Specialist Group, with funding provided by the government of Germany and the Principality of Monaco and with technical support from the Sharks MOU Advisory Committee.