[indistinct voices] [derilus speaking] [whistle blowing] [cesar palencia chavez speaking spanish] [pastor gustavo banda speaking spanish] protester: apology. [indistinct crowd voices] protesters chanting: apology! apology! [derilus speaking] [chavez speaking] [man speaking] rivera-collazo: something said of climate migrants and environmental migrants is that often there is no population to go back to. the same thing happens with wars. so, those that migrate, they have a very tough time to be able to continue their way of life, especially if they are left alone within a city or a place that they don't know and there are no other people from their own country. narrator: tijuana is adapting to an influx of haitian immigrants who are testing the city's ability to support them. in ulaanbaatar, the capital of mongolia, more than 600,000 nomadic herders have moved to the city, leaving a deeply- rooted lifestyle now threatened by climate change. [men speaking indistinctly] mitsuaki toyoda: people in mongolia have been practicing herding for centuries since the era of genghis khan. even today, abo