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<p>This may be feasible for short missions of <a href="page.php?w=spacecraft">spacecraft</a>, but it is not the most viable solution when dealing with the life-support systems of a long-term craft (such as a <a href="page.php?w=generation_ship">generation ship</a>) or a settlement.</p>

<p>The aim of CELSS is to create a regenerative environment that can support and maintain <a href="page.php?w=human">human</a> life via <a href="page.php?w=agricultural">agricultural</a> means.</p>

<p><big>Components of CELSS</big></p>
<p><big>Air revitalization</big></p>
<p>In non-CELSS</p><p>
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