<!doctype html public "-//W3C//DTD W3 HTML//EN">
<html><head><style type="text/css"><!--
blockquote, dl, ul, ol, li { padding-top: 0 ; padding-bottom: 0 }
--></style><title>PNAS - Housing growth puts squeeze on
wilderness</title></head><body>
<div><font face="Geneva" size="-1" color="#000000">PNAS. January 12,
2010.</font></div>
<div><font face="Geneva" size="-1" color="#000000">Housing growth in
and near United States protected areas limits their conservation
value.</font></div>
<div><font face="Geneva" size="-1" color="#000000">Volker C. Radeloff,
Susan I. Stewart et al.</font></div>
<div><font face="Verdana" size="-1" color="#000000"><br></font></div>
<div><font face="Geneva" size="-1" color="#000000">"If long-term
trends continue, another 17 million housing units will be built within
50 km of protected areas by 2030 (1 million within 1 km), greatly
diminishing their conservation value. US protected areas are
increasingly isolated, housing development in their surroundings is
decreasing their effective size Š "<br>
<br>
" Š housing growth poses the main threat to protected areas in the
United States whereas deforestation is the main threat in developing
countries."</font><br>
<font face="Geneva" size="-1" color="#000000"></font></div>
<div><font face="Geneva" size="-1" color="#000000">"Wilderness areas
enjoy the highest level of protection, but that does not limit
development in their surroundings. In 2000, 20.5 million housing units
were within 50 km of a designated wilderness area (18% of all housing
units in the conterminous United States), compared with only 4.4
million (12%) in 1940 (Fig. 1). Wilderness areas also exhibited the
highest housing growth rates in their immediate vicinity (Fig. 2). The
number of housing units within 1 km of a wilderness area grew from
9,400 in 1940 to 54,000 in 2000 (474% growth)."</font></div>
<div><font face="Geneva" size="-1" color="#000000"><br></font></div>
<div><font face="Verdana" size="-1"
color="#000000"
>===========================================================</font></div
>
<div><font face="Verdana" size="-1"
color="#000000"><i><b>Science</b></i><b> 20 MARCH 2015.</b> A safe
operating space for iconic ecosystems: Manage local stressors to
promote resilience to global change. Scheffer et al.</font></div>
<div><font face="Verdana" size="-1"
color="#000000"> </font><font face="Geneva" size="-1"
color="#000000"><br>
</font><font face="Verdana" size="-1"
color="#000000"
>==========================================================</font></div
>
<div><font face="Verdana" size="-1" color="#000000"><i><b>Physics
Today</b></i><b> August 2003.</b> The Discovery of Rapid Climate
Change. Spencer Weart.</font></div>
<div><font face="Verdana" size="-1"
color="#FFFF00"><u
>http://scitation.aip.org/content/aip/magazine/physicstoday/article/5<span
></span>6/8/10.1063/1.1611350</u></font></div>
<x-sigsep><pre>--
</pre></x-sigsep>
<div><font face="Verdana" size="-1"
color="#000000"
>===========================================================</font></div
>
</body>
</html>