natutural disasters a a young germanan physicist a t britaiain's oxford u universits studying hururricane harvevey. similar r studies on the floodsn louisiana last year r produced clear resusults. friederike: duriring those stuts we disiscovered that climate change had, on average, doubled the probability of this torrentitial rain occurring.g. so it wowould be surprising ife got a totally different result in a neighboring statete at te same timime of yeajujust 12 mohs lar. repoporter: so far the discussn ababout natural l disasterers ad their possibible link to c clie change has been largely a political one. it's a high-stakes debate, involving powerful industries on the one hand, and a risk to people's lives on the other. frieiederike: in m most cases s always b been liticicianwho put forwrwd answers in the debatat. that w was what motitivated uo say, over ththe past five year, wewe've delopeped these methos thatat allow us toto make a qualified asassessment, anande needed to publicizize that. reporter: itit's a whole f fid known as attribution science. the data of rerecent extreme weather events