worldwide,e, habitablele zonese shrinking,g, which couldld have drastic knock-on effects. llllions opeopople cld potentlllly beorced d om the hos. friederike: thth allhe atwaves that we'vetudidiedn various ntinentseuropen summ is in ft one ofhe hopots, you lik foror imate change. not onhe same vel asashe arct, bubut vertrthele, it's's place where u can e that imate chan h has snificantly creased e probility of this k. reporter: the implications of this relatively new science could change our world. three coastal communities in california have now filed a lawsuit against exxoxon mobil d otother fossil fuel l produce, saying t that rising seaea les are linked to harmful emissions. and countries like the united states or germany might one day actually be called to account for failing to achieve their environmental goals, thereby promoting climate change -- all on the basis of evidence producuced by attribibution sci. host: by 2040, experts expect renewables to o be supplyingnge amamounts of enenergy. and the e industry is s also drg job growowth. the sector alreaeady employs