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<a accesskey="3" href="page.php?w=runaway_greenhouse_effect&amp;p=2">3.Next</a>
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<p>A <b>runaway greenhouse effect</b> occurs when a planet's atmosphere contains <a href="page.php?w=greenhouse_gas">greenhouse gas</a> in an amount sufficient to block thermal radiation from leaving the planet, preventing the planet from cooling and from having liquid water on its surface. A runaway version of the <a href="page.php?w=greenhouse_effect">greenhouse effect</a> can be defined by a limit on a planet's <a href="page.php?w=outgoing_longwave_radiation">outgoing longwave radiation</a>, which is asymptotically reached due to higher surface</p><p>
<a accesskey="3" href="page.php?w=runaway_greenhouse_effect&amp;p=2">3.Next</a>
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