One of the biggest factors hurting chimpanzees in ivory coast has been environmental a problem that was exacerbated when the country's 2010-11 post-election violence which killed more than 3000 people. Tai national park is located in the western region, which saw some of the conflict's worst fighting. Boesc said six habituated chimpanzees were killed, probably by poacher. Long before the violence, however, humans were encroaching on the chimps'home. Boesch said that when he first approached the park on a drive in 1979 he encountered 100km of uninterrupted greenery.