Study of 800-year-old tree rings backs global warming

Seattle Times: Study of 800-year-old tree rings backs global warming The decline in recent decades of the mountain snows that feed the West's major rivers is virtually unprecedented for most of the past millennium, according to new research published today. Heavy runoff making river trips difficult, dangerous Science Surging Columbia River: Don't let this year fool you This year, the Columbia River is swollen with massive runoff from mountain snowpacks, making for wild and sometimes perilous conditions......

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