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<p>Ammonia, a gas at room temperature, is more expensive to produce than hydrogen. However, it can be stored more cheaply than hydrogen. Tank storage is usually done at between one and ten <a href="page.php?w=Bar_%28unit%29">times atmospheric pressure</a> and at a temperature of , in liquid form. Ammonia has <a href="page.php?w=Ammonia">multiple uses</a> besides being an energy carrier: it is the basis for the production of many chemicals; the most common use is for fertilizer. It can be used for power generation directly, or converted back to hydrogen</p><p>
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