A significant amount of carbon has been stored in Arctic permafrost for tens of thousands of years. And unless we take radical steps to restore the ecosystem that we destroyed there, the permafrost will melt and release 1400 GT of carbon dioxide and methane into the atmosphere. This dwarfs the amount humans generate annually and would accelerate climate change on an exponential scale. So, what can we do to reestablish the grasslands and reintroduce the animals that used to dominate the region?