there's both freshwater and saltwater in the senegal river delta.ature conservation makes sense here. protecting the ecosystem also creates jobs. zeine: the goal of the park is to restore the ecosystem and fight poverty. why fight poverty in this region? bebecause the local l populatn does traditional work -- they harvest whatever nature provides. the local economy is based onn fishing and fafarming. if there's no more water, there will be nothing left here. reporter: : locally y caught tia is hung out to dry in the open air. many villages have no electricity, let alone refrigerators. fishermen sell their fish across the country and even in neighboring senegal. cheikh: in the past, people here lived from farming, too. but really, fishing makes most sense. we can make a living from fishing all year rouound. we benefit from the lock and the basin -- there are lots of fish here. reporter: the abundance of fish is a recent development. 30 years ago the region was left ravaged by this dam -- built in the mid-1980's to supply mauritania, senel,l, gambi an