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: '''Nuclear fusion''' is possible in [[laboratory|laboratories]] on [[Earth]] but it cannot be sustained for long periods of [[time]] to produce enough [[energy]] to be useful as an [[Energy Resource|energy resource]].
: '''Nuclear fusion''' in [[laboratory|laboratories]] on [[Earth]] must be done at much higher [[temperature]] than in the centre of [[Star]]s because the centre of [[Star]]s is a much higher [[pressure]] so [[Atomic Nucleus|nuclei]] collide more often.
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| style="height:20px; width:400px; text-align:center;" |'''Fusion''' of two [[Hydrogen]] [[Atomic Nucleus|nuclei]] ([[proton]]s) produces a [[Deuterium]] [[Atomic Nucleus|nucleus]].
<math>{}_1^1H + {}_1^1H \rightarrow {}_1^2H</math>
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