narrator: on this episode of "earth focus," climate change is forcing people to migrate in search of food and shelter, altering traditional lifestyles across the globe. in tijuana, mexico, haitians fleeing devastation are building a neighborhood as their dreams of entering the united states dwindle. while in mongolia, the traditional herding lifestyle is threatened as drought forces a new generation to the capital in search of opportunities.

[makelson derilus speaking spanish]

[greetings exchanged in spanish] [man on podium speaking spanish]

[man speaking spanish]

[both speaking spanish] [derilus speaking] isabel rivera-collazo: we think of migrants and refugees as these people that are coming to take over our country. we don't see that these are the people that got to the point that it was so hard for them to survive that it was easier to face death than to stay. because that's what they are facing when they decide to get on a boat or they

decide to c cross a border or ty decide to cross the desert, they're facing their own death, they're facing the death of their loved ones, theirir children,ndnd that is a better decision than staying behind. reporter: look at the size of this storm on satellite at this hour. tonight a direct hit in haiti slamming ashore at t 145 mileles per hohour. [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! [deris s speakingng]

[chavez speaking]

[man speaking] rivera-collazo: something said of climate migrants and environmental migranants is that often there is no population to go back k to. the same thing happensns with wars. soso, 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 capitalal of mongolia,a, more thanan 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 herrding for centuries since the

era of genghis khan. even today, about one-quarter of the population live a nomadic life. [lamb bleating] toyoda: a dzud is a climatic term used in mongolia, which is characterized by summer drought followed by severe winter weather. the dzud used to happen

every 10 years or so, but it's becoming more frequent. [lamb bleating] [child chattering]

toyoda: there is about 750,000 people living in the care districts where infrastructure is very limited.

toyoda: the young people in mongolia is no different from any otheher young people livingn other couountrs. they arere very currious about what the ururban life can offer to them.

toyoda: we need better long-term strategies to make sure that the livestock sector will become more sustainable. so it's probably better that we focus our assistance toward marginal herders, especially to try to protect their livestock so that they can maintain their traditional nomadic way of life.

annocer: "eah focus"s made ossible part by..

man:n: our peoplple have livivee for thousandnds of yearsrs and t just survived, butut really thriveved. different man: the valley was plumbed. the more you spread water, thehe more lifefe you ha. different man: when creeks and rivers and ditches and everything was channelized and it didn't flow around freely like it used to, thahat defininitely impacacted a lot tf the grouound, the sosoil, and te way this place is.