People frequently say “green” to mean “environmentally friendly.” But encroaching conifer forests — really big greens — threaten to further spike the far North’s already low-grade fever.
Throughout the past century, however, leading edges of conifer forests began creeping some 20 to 60 meters up the mountains, and in some places these forests are now overrunning tundra, scientists report in the July Global Change Biology.
Zaproot Video: Trees Invade the Arctic
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