Half a croissant, on a plate, with a sign in front of it saying '50c'
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science: energy: thermal: geothermal
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Ideas are sorted alphabetically.
Ideas in bold have been created this week.
 (-1)  Earth Battery 
   Geothermal Power Drill 
 (+3, -1)  Geothermal Power Reduction Drill 
 (+2, -10)(+2, -10)  Geothermal Stirling Engine 
   Geothermal Venting 
 (+4, -2)  Geothermic Tube 
 (-7)(-7)  Hot Diamond Column 
 (+7)  Lava wells 
 (-3)  Man made geothermal 
 (+3, -1)  Passive geothermal heat 
 (+15)(+15)  Welsh National Peltier 

 

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