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	<title>The Why Files &#187; Populations, resources, and environments</title>
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	<description>The Science Behind The News</description>
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		<title>Planetary limits: More than just global warming</title>
		<link>http://whyfiles.org/2009/planetary-limits-more-than-just-global-warming/</link>
		<comments>http://whyfiles.org/2009/planetary-limits-more-than-just-global-warming/#comments</comments>
		<pubDate>Thu, 01 Oct 2009 22:04:31 +0000</pubDate>
		<dc:creator>admin</dc:creator>
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		<category><![CDATA[Grades 5-8]]></category>
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		<category><![CDATA[In The News]]></category>
		<category><![CDATA[Natural and human-induced hazards]]></category>
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		<category><![CDATA[Science and technology in local, national, and global c]]></category>
		<category><![CDATA[Science in Personal and Social Perspectives]]></category>
		<category><![CDATA[Weather & Climate]]></category>
		<category><![CDATA[air pollution]]></category>
		<category><![CDATA[biodiversity loss]]></category>
		<category><![CDATA[chemical pollution]]></category>
		<category><![CDATA[exceeding planetary boundaries could block key ecosystem services: climate change]]></category>
		<category><![CDATA[fertilizer use]]></category>
		<category><![CDATA[freshwater use]]></category>
		<category><![CDATA[land use]]></category>
		<category><![CDATA[ocean acidification]]></category>
		<category><![CDATA[ozone loss]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=2842</guid>
		<description><![CDATA[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?]]></description>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>New concern as ocean grows more acidic</title>
		<link>http://whyfiles.org/2008/new-concern-as-ocean-grows-more-acidic/</link>
		<comments>http://whyfiles.org/2008/new-concern-as-ocean-grows-more-acidic/#comments</comments>
		<pubDate>Thu, 13 Nov 2008 21:18:49 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
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		<category><![CDATA[carbon dioxide]]></category>
		<category><![CDATA[dolphins]]></category>
		<category><![CDATA[fossil fuel pollution]]></category>
		<category><![CDATA[global warming]]></category>
		<category><![CDATA[greenhouse gas]]></category>
		<category><![CDATA[marine mammals]]></category>
		<category><![CDATA[noise]]></category>
		<category><![CDATA[ocean acidification]]></category>
		<category><![CDATA[ocean acidity]]></category>
		<category><![CDATA[sonar]]></category>
		<category><![CDATA[sound]]></category>
		<category><![CDATA[stranding]]></category>
		<category><![CDATA[whales]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=1072</guid>
		<description><![CDATA[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?]]></description>
		<wfw:commentRss>http://whyfiles.org/2008/new-concern-as-ocean-grows-more-acidic/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
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		<item>
		<title>Mystery of the disappearing ice sheet</title>
		<link>http://whyfiles.org/2008/mystery-of-the-disappearing-ice-sheet/</link>
		<comments>http://whyfiles.org/2008/mystery-of-the-disappearing-ice-sheet/#comments</comments>
		<pubDate>Thu, 04 Sep 2008 21:38:19 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
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		<category><![CDATA[Science in Personal and Social Perspectives]]></category>
		<category><![CDATA[Weather & Climate]]></category>
		<category><![CDATA[Anders Carlson]]></category>
		<category><![CDATA[Canada]]></category>
		<category><![CDATA[climate prediction]]></category>
		<category><![CDATA[Greenland ice sheet]]></category>
		<category><![CDATA[Greenland icecap]]></category>
		<category><![CDATA[ice sheet]]></category>
		<category><![CDATA[Laurentide ice sheet]]></category>
		<category><![CDATA[rapid melting]]></category>
		<category><![CDATA[sea level rise]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=1063</guid>
		<description><![CDATA[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.]]></description>
		<wfw:commentRss>http://whyfiles.org/2008/mystery-of-the-disappearing-ice-sheet/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
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		<item>
		<title>Fishing: The power of profit</title>
		<link>http://whyfiles.org/2007/fishing-the-power-of-profit/</link>
		<comments>http://whyfiles.org/2007/fishing-the-power-of-profit/#comments</comments>
		<pubDate>Thu, 06 Dec 2007 20:26:08 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
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		<category><![CDATA[Animals]]></category>
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		<category><![CDATA[Food]]></category>
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		<category><![CDATA[Populations, resources, and environments]]></category>
		<category><![CDATA[Science in Personal and Social Perspectives]]></category>
		<category><![CDATA[community fishing]]></category>
		<category><![CDATA[economic model]]></category>
		<category><![CDATA[fish stocks]]></category>
		<category><![CDATA[fishing pressure]]></category>
		<category><![CDATA[fishing regulation]]></category>
		<category><![CDATA[profit]]></category>
		<category><![CDATA[profitability]]></category>
		<category><![CDATA[reduced cost]]></category>
		<category><![CDATA[restricting fishing]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=1028</guid>
		<description><![CDATA[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?]]></description>
		<wfw:commentRss>http://whyfiles.org/2007/fishing-the-power-of-profit/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Ancient cities: A new plan for sprawl?</title>
		<link>http://whyfiles.org/2007/ancient-cities-a-new-plan-for-sprawl/</link>
		<comments>http://whyfiles.org/2007/ancient-cities-a-new-plan-for-sprawl/#comments</comments>
		<pubDate>Thu, 30 Aug 2007 22:46:45 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
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		<category><![CDATA[Historical perspectives]]></category>
		<category><![CDATA[History and Nature of Science]]></category>
		<category><![CDATA[Paleontology & archeology]]></category>
		<category><![CDATA[Populations, resources, and environments]]></category>
		<category><![CDATA[Science in Personal and Social Perspectives]]></category>
		<category><![CDATA[Social Science]]></category>
		<category><![CDATA[ancient Syria]]></category>
		<category><![CDATA[archeology]]></category>
		<category><![CDATA[city development]]></category>
		<category><![CDATA[city growth]]></category>
		<category><![CDATA[Fertile Crescent]]></category>
		<category><![CDATA[Middle East]]></category>
		<category><![CDATA[new settlements]]></category>
		<category><![CDATA[villages life]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=1012</guid>
		<description><![CDATA[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.
]]></description>
		<wfw:commentRss>http://whyfiles.org/2007/ancient-cities-a-new-plan-for-sprawl/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Coral Reefs: Imagine an Ocean without them!</title>
		<link>http://whyfiles.org/2006/coral-reefs-imagine-an-ocean-without-coral-reefs/</link>
		<comments>http://whyfiles.org/2006/coral-reefs-imagine-an-ocean-without-coral-reefs/#comments</comments>
		<pubDate>Thu, 21 Sep 2006 20:44:49 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
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		<category><![CDATA[Environment]]></category>
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		<category><![CDATA[Grades 5-8]]></category>
		<category><![CDATA[Grades 9-12]]></category>
		<category><![CDATA[Human]]></category>
		<category><![CDATA[Natural and human-induced hazards]]></category>
		<category><![CDATA[Populations, resources, and environments]]></category>
		<category><![CDATA[Science in Personal and Social Perspectives]]></category>
		<category><![CDATA[Caribbean]]></category>
		<category><![CDATA[coral reefs]]></category>
		<category><![CDATA[development reef destruction]]></category>
		<category><![CDATA[disease]]></category>
		<category><![CDATA[fertilization]]></category>
		<category><![CDATA[Florida Keys]]></category>
		<category><![CDATA[global warming]]></category>
		<category><![CDATA[saving reefs]]></category>
		<category><![CDATA[sustainable development]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=918</guid>
		<description><![CDATA[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?]]></description>
		<wfw:commentRss>http://whyfiles.org/2006/coral-reefs-imagine-an-ocean-without-coral-reefs/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Tracking Sea Turtles, Making New Maps</title>
		<link>http://whyfiles.org/2006/tracking-sea-turtles-making-new-maps/</link>
		<comments>http://whyfiles.org/2006/tracking-sea-turtles-making-new-maps/#comments</comments>
		<pubDate>Thu, 25 May 2006 20:14:51 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
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		<category><![CDATA[Biology]]></category>
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		<category><![CDATA[Grades 5-8]]></category>
		<category><![CDATA[Grades 9-12]]></category>
		<category><![CDATA[Natural and human-induced hazards]]></category>
		<category><![CDATA[Plants & animals]]></category>
		<category><![CDATA[Populations, resources, and environments]]></category>
		<category><![CDATA[Science and technology in local, national, and global c]]></category>
		<category><![CDATA[Science in Personal and Social Perspectives]]></category>
		<category><![CDATA[Cape Verde]]></category>
		<category><![CDATA[loggerhead sea turtles in eastern Atlantic]]></category>
		<category><![CDATA[new foraging behavior]]></category>
		<category><![CDATA[study]]></category>
		<category><![CDATA[turtle conservation]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=893</guid>
		<description><![CDATA[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.]]></description>
		<wfw:commentRss>http://whyfiles.org/2006/tracking-sea-turtles-making-new-maps/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Immigration to U.S.</title>
		<link>http://whyfiles.org/2004/immigration-to-us/</link>
		<comments>http://whyfiles.org/2004/immigration-to-us/#comments</comments>
		<pubDate>Thu, 22 Apr 2004 18:24:42 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
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		<category><![CDATA[Energy]]></category>
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		<category><![CDATA[Environment & pollution]]></category>
		<category><![CDATA[Grades 5-8]]></category>
		<category><![CDATA[Grades 9-12]]></category>
		<category><![CDATA[Human Behavior]]></category>
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		<category><![CDATA[Science and Technology]]></category>
		<category><![CDATA[Science in Personal and Social Perspectives]]></category>
		<category><![CDATA[Understandings about science and technology]]></category>
		<category><![CDATA[environmental aspects]]></category>
		<category><![CDATA[immigration and population growth]]></category>
		<category><![CDATA[immigration restriction]]></category>
		<category><![CDATA[Sierra Club]]></category>
		<category><![CDATA[U.S. immigration level]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=627</guid>
		<description><![CDATA[As Congress, president debate changes to immigration laws, we wonder if immigration-fueled population growth is an environmental issue. Should United States reduce immigration?]]></description>
		<wfw:commentRss>http://whyfiles.org/2004/immigration-to-us/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Soil Matters: More than You Think!</title>
		<link>http://whyfiles.org/2004/soil-matters/</link>
		<comments>http://whyfiles.org/2004/soil-matters/#comments</comments>
		<pubDate>Thu, 08 Apr 2004 18:45:02 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
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		<category><![CDATA[Other]]></category>
		<category><![CDATA[Personal and community health]]></category>
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		<category><![CDATA[Science in Personal and Social Perspectives]]></category>
		<category><![CDATA[Structure and function in living systems]]></category>
		<category><![CDATA[agriculture]]></category>
		<category><![CDATA[crops]]></category>
		<category><![CDATA[dirt]]></category>
		<category><![CDATA[erosion]]></category>
		<category><![CDATA[farming]]></category>
		<category><![CDATA[salinization]]></category>
		<category><![CDATA[soil]]></category>
		<category><![CDATA[soil fertility]]></category>
		<category><![CDATA[sustainable development]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=640</guid>
		<description><![CDATA[History shows societies collapse without soil. What can the world cando to keep our dirt clean?]]></description>
		<wfw:commentRss>http://whyfiles.org/2004/soil-matters/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Evolution at Work: A Superheated Story</title>
		<link>http://whyfiles.org/2004/evolution-at-work/</link>
		<comments>http://whyfiles.org/2004/evolution-at-work/#comments</comments>
		<pubDate>Thu, 08 Jan 2004 20:16:06 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
				<category><![CDATA[All]]></category>
		<category><![CDATA[Bio brainstorms]]></category>
		<category><![CDATA[Biological Evolution]]></category>
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		<category><![CDATA[Genetic revolution]]></category>
		<category><![CDATA[Grades 5-8]]></category>
		<category><![CDATA[Grades 9-12]]></category>
		<category><![CDATA[Interdependence of organisms]]></category>
		<category><![CDATA[Life Science]]></category>
		<category><![CDATA[Molecular basis of heredity]]></category>
		<category><![CDATA[Populations, resources, and environments]]></category>
		<category><![CDATA[Science in Personal and Social Perspectives]]></category>
		<category><![CDATA[body heat]]></category>
		<category><![CDATA[DNA]]></category>
		<category><![CDATA[energy-deficiency diseases]]></category>
		<category><![CDATA[evolution]]></category>
		<category><![CDATA[evolutionary medicine]]></category>
		<category><![CDATA[genetics]]></category>
		<category><![CDATA[mitochondria]]></category>
		<category><![CDATA[mutations]]></category>
		<category><![CDATA[polar people]]></category>
		<category><![CDATA[warm-blooded]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=528</guid>
		<description><![CDATA[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.]]></description>
		<wfw:commentRss>http://whyfiles.org/2004/evolution-at-work/feed/</wfw:commentRss>
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