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Decades of scientific evidence demonstrate unequivocally that human activities jeopardize life on Earth. Dangerous anthropogenic interference with the climate system compounds many other drivers of global change. Governments concur: The science is settled.

In their zeal to promote the importance of climate change as an ecological driver, climate scientists increasingly are ignoring the profound role that indigenous peoples played in fire and vegetation dynamics, not only in the eastern United States but worldwide, according to a Penn State research