Earth's 'vital signs' worsening as humanity's impact deepens

The global economy's business-as-usual approach to climate change has seen Earth's "vital signs" deteriorate to record levels, an influential group of scientists said Wednesday, warning that several climate tipping points ...

New study gauges health of the Greater Yellowstone Ecosystem

A Montana State University study of Yellowstone National Park and the surrounding area shows that increased population and density, as well as a changing climate, are affecting the overall ecological health of the region.

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