With about 100 sheep and goats Jugder Samdan makes just enough to scrape by as a nomadic herder in Mongolia, basking in the sun as he watches over his animals. But he worries about the future.

Samdan has seen major changes during his 70 plus years on the vast semi-arid grassland, or steppe, in central Mongolia's Arkhangai province, with shifts in politics and society impacting one of the world's last remaining nomadic cultures.

But what most concerns Samdan and fellow herders is climate change, as droughts, harsh winters, and over-grazing threaten traditional livelihoods and drive younger people to the over-crowded capital — fueling pollution, crime and mental illness.