News tagged with human population density

Tracking invasive species? Follow the people

Islands and populated coastal areas are the world's "hotspots" for invasive species, which can upend entire ecosystems and drive local animals and plants to extinction, a study reported Monday.

dateJun 12, 2017 in Ecology
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Image: Virunga Mountains

This Sentinel-1 radar composite image features the Virunga Mountains in East Africa: a chain of volcanoes stretching across Rwanda's northern border with Uganda and east into the Democratic Republic of the Congo.

dateNov 11, 2016 in Earth Sciences
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Why innovation thrives in cities

In 2010, in the journal Nature, a pair of physicists at the Santa Fe Institute showed that when the population of a city doubles, economic productivity goes up by an average of 130 percent. Not only does total productivity ...

dateJun 04, 2013 in Social Sciences
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