declaration calling for bold action on modern slavery. part of a two-day vatican summit on climate change and human trafficking. a conference paper explains that global warming is one of the causes of poverty and forced my graduation and he sees the two issues as interconnected emergencies. >> translator: it's not a green encyclical. the social life of people we cannot separate the care of the environment. one of the things we notice the most when the environment, the creation is not well cared for is the disproportionate growth of cities. it's as if the heads, the big cities get bigger but with rings of more poverty and misery. rome's mayor faced it head on. >> translator: slavery still exists despite the fact that it is illegal and punished many