Érica canuto: in some cases a prison sentence is necessary, but in all cases we have to convince menreflect on their behaviour, so they change themselves. carla, francisco's wife says he has changed. he hasn't hit her since he finished the course. so far, none of the other 150 participants have re-offended either. carla de oliveira: i used to give him so many chances, but it didn't help. not until i decided to report him did things change. if i'd done it earlier, my life would have been much better. >> panic buttons for women, anti-aggression courses for men: they're small first steps. brazil's struggle against domestic violence and machismo will be a long one. >>to africa now as we zoom in on an area of western senegal which should, on the face of it, be fertile. after all, the land in question borders a national park renowned for its rich biodiversity. nevertheless, farmers here are struggling to make a living. climate change is making the soil ever dryer and added to that, the felling of mangrove trees along the atlantic coast has left it vulnerable to encroaching salinization. no