gailine: we have to cut a lot. the lowest to the ground.e have to make it a little bit, so that you can see. so that's why we use this poison so that it won't grow again. reporter: weedkiller destroys the invasive pntand stops them from spreading and consuming valuable groundwat. it will take 30 years to kill off the acacias for good. the project is financed by the water fund for cape town. louise stafford hopes it hasn't come too late. and all the hard work is pointless if it doesn't rain. louise: we need to change our relationship with water. we need to change the way we see these water supply areas and then we need to change the way that we work with nature. and we need to do everything possible to work with nature to make nature reesistant, resistant in these circumstances. otherwise, we're facing a total collapse. host: from south africa to west africa. what do people eat in ivory coast? we take a look. report: abidn is the commercial capital of ivory ast, a citof 4.5 milon ople. on the frie of marco market is the snack stall that paco