Rapidly Melting Permafrost Has Tipped the Arctic Into Being a Net Greenhouse Gas Emitter

Rapidly Melting Permafrost Has Tipped the Arctic Into Being a Net Greenhouse Gas Emitter

Global warming’s disproportionate effect on the planet’s polar regions has turned the Arctic into a net carbon emitter, with one-third of the region’s forests, tundra and wetlands now emitting more greenhouse gases than they absorb as the previously-frozen permafrost thaws. “It is the first time that we’re seeing this shift