we've got to help them with infrastructure been in terms of our humanity, helping the poor. africa is where we will be most tested. >>chris: how do even begin to address these concentrations of misery? >> one of the great achievements in development history what was called the green revolution. new varieties of crops. corn, which everyone called maiz. rice and wheat. people thought india would experience mass starvation because the output went up. they were able to improve their nutrition, even when their proposition was growing. we need to do that same thing for africa. >>chris: it seems that climate change could be the accelerant to all of the bad things in terms of agricultural productivity, global health,