w. it from m our animalals and te food we e grow here. porter: of all the contaminated areas in the region, the levels in the Öttinger forest are most t seveund pichler l loves ths forest but w he can even coect shrooms here. mund: thfoforestere isisart ths of my heat.. it been coaminatedy pfoa,both s c come. it will prs fore it'gonene. you can'see it, t a partfted.yo. our imat haseeeen bay reporter: ednd picicer has lost a pt t of h home to pfoa. he hop he won'lose his healtho. pfoa wl be offially baed 2020but the ll scalef the problem n't beco clear fy, decades to come. host: wewe meet teagerers from around the wor and ask what's imimpoant totohem. >> i am a global teen. host: today, our global teen comes from colombia. juan: my name is juan carlos contreras nobles and i am 16. i live in sempegua in the department of cesar in colombia. i have four siblings. two sisters and two brothers. one of the boys is my twin. the girls are four and 11 years old. and the boys, my twin brother is 16, like me, and my big brother is 18. my father works in construction and he also fishes here in the ciÉnaga de zapatosa. my mother is a housewife and she a