In the Arctic, a great change is taking place. Permafrost, which covers around 25 percent of exposed land in the Northern Hemisphere, is melting.
Dear EarthTalk: How much of a threat does climate change pose to the tundra ecosystems of the far north? — Seamus Hall, via EarthTalk.org The tundra biome is among the coldest of the planet’s ecosystems. Its harsh climate means that plant life is unable to grow more than a few centimeters above the ground. The name ‘tundra’ […]