Arctic permafrost traps much of the world’s carbon dioxide and methane below the Earth’s surface. But as Arctic temperatures rise, that frozen soil may not be able to hold all that gas for much longer. Those increased emissions could cost us big. As the permafrost melts, the greenhouse gases released could lead to $43 trillion worth of economic damage by 2200, according to a new study. That’s over $230 billion each year, or $26.5 million each hour.