<?xml version="1.0" encoding='utf-8'?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN" "http://www.wapforum.org/DTD/wml_1.1.xml">
<wml>
<card id="card1" title="Greenhouse effect - Page 1 - Wikipedia">
<p>
<a accesskey="3" href="page.php?w=Greenhouse_effect&amp;p=2">3.Next</a>
</p>
<p>The <b>greenhouse effect</b> occurs when <a href="page.php?w=Greenhouse_gas">heat-trapping gases in a planet's atmosphere</a> prevent the planet from losing heat to space, raising its surface temperature. Surface heating can happen from an internal heat source (as in the case of <a href="page.php?w=Jupiter">Jupiter</a>) or come from an external source, such as a <a href="page.php?w=host_star">host star</a>. In the case of <a href="page.php?w=Earth">Earth</a>, the <a href="page.php?w=Sun">Sun</a> emits <a href="page.php?w=shortwave_radiation">shortwave radiation</a></p><p>
<a accesskey="3" href="page.php?w=Greenhouse_effect&amp;p=2">3.Next</a>
</p>

<do type="prev" label="Search">
        <go href="search.wml"/>
</do>

</card>
</wml>
