Archive for the ‘Populations, resources, and environments’ Category


Planetary limits: More than just global warming - Thursday, October 1st, 2009

Scientists propose 9 limits on human actions: Wrecking ozone, over-using fertilizer, killing species could block key “ecosystem services.” Are there natural limits to fresh water use and pollution?



New concern as ocean grows more acidic - Thursday, November 13th, 2008

Each hour, the ocean dissolves 1 million tons of carbon dioxide from burning fossil fuel. As the water grows more acidic, sound travels further. What will happen to marine mammals, which rely on an exquisite sense of hearing?



Mystery of the disappearing ice sheet - Thursday, September 4th, 2008

Rapid melting of Canadian ice sheet suggests that Greenland’s massive ice cap could melt and raise sea level much faster than predicted within a century.



Fishing: The power of profit - Thursday, December 6th, 2007

Study shows the wisdom of allowing fish stocks to recover. Production is higher, but costs are lower. What would it take to bring economic and environmental sanity to the fishing industry?



Ancient cities: A new plan for sprawl? - Thursday, August 30th, 2007

Archeologists thought Middle-Eastern cities grew through remote “daughter” villages. But a new study of a big city in ancient Syria, shows that new settlements formed closer to town.



Coral Reefs: Imagine an Ocean without them! - Thursday, September 21st, 2006

Hurricanes, disease and heat deliver another body blow to Caribbean coral reefs — the centers of biodiversity, fish nurseries and guardians of shorelines. Must we kiss coral goodbye?



Tracking Sea Turtles, Making New Maps - Thursday, May 25th, 2006

Where do sea turtles go when they swim in the sea? New information from West Africa shows a complex pattern of migration and gives clues about how to conserve these ancient mariners.



Immigration to U.S. - Thursday, April 22nd, 2004

As Congress, president debate changes to immigration laws, we wonder if immigration-fueled population growth is an environmental issue. Should United States reduce immigration?



Soil Matters: More than You Think! - Thursday, April 8th, 2004

History shows societies collapse without soil. What can the world cando to keep our dirt clean?



Evolution at Work: A Superheated Story - Thursday, January 8th, 2004

Studies of mitochondria show that polar people evolved greater ability to create heat; study has health implications for energy-deficiency diseases, Alzheimer’s disease and Parkinson’s disease.


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