High atop the Luossavaara Mountain in northern Sweden, Sami reindeer herder Lars-Marcus Kuhmunen mapped out a bleak future for himself and other Indigenous people whose reindeer have roamed this land for thousands of years. An expanding iron-ore mine and a deposit of rare-earth minerals are fragmenting the land and altering ancient reindeer migration routes. But with the Arctic warming four times faster than the rest of the planet, herders say they need more geographic flexibility, not less, to ensure the animals' survival.