Active in the development of women’s cinema since the 1980s, Marena has collaborated with Italian (Videogruppo, Rai Tre and La7) and international (ZDF and Planete) television networks. She has made documentaries like La fabbrica degli animali, Tute bianche, Mi piaceva vivere lassù, No Tav - Gli indiani della valle, Il cartun d’le ribelliun, Libellule and Lo sbarco.