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Find out what words on egg cartons mean

<div class="meta image-caption"><div class="origin-logo origin-image"><img src="http://cdn.abclocal.go.com/assets/news/kabc/images/logos/origin.png" alt="KABC"></div><span class="caption-text origin-image"><p>Egg cartons list all sorts of terms such as &#39;organic&#39; or &#39;cage-free.&#39; But what do they mean?  </p></span></div>
February 2, 2011 9:23:13 AM PST