louise swewemmer works f for e park admininistration. their workshop is ju f for alerers.here's plenty of interest bebecause there e is a sevee shortage o of medicinal l pla. professisional trafficickers sl huge amounts tsupply custotomers in the citieies, so local l hes need altlternative souource. rosie: we e teach them h how to plant, how to harvest t in a sustaiainable way. so that t tomorrow, oror maybe somebody e else if he cocome e can also get this medicill planant. reporter: louiuise swemm s saya priority i is prorotecthe plplants that grgrow in the p. atat the workskshops, the heas discscuss whether r they can e leaves r rather than b bark. louise: it's really an engagement process. we are here to talk and d to len togegether with ththe healersd try anand work out w ways in wh wewe can work totogether to se sosome of these e plants for e bebenefit of everybody. reportrter: all the healers at e woworkshop get s some saplingo plant on their land so they veve theieir owsourcece of leaves ad bark.. but the vovolume is not t neay enough to o supp the c cits. that is a