public int getBurnDurationOfFuelBlock(int blockID)
   {
      int time = 0;

      if(fuelBlocksGroupIDlist_Wool.contains(blockID))
      {
         time = Arctica.burnDuration_Wool;
      }
      else if(fuelBlocksGroupIDlist_CraftedWood.contains(blockID))
      {
         time = Arctica.burnDuration_CraftedWood;
      }
      else if(fuelBlocksGroupIDlist_Log.contains(blockID))
      {
         time = Arctica.burnDuration_Log;
      }
      else if(fuelBlocksGroupIDlist_CoalOre.contains(blockID))
      {
         time = Arctica.burnDuration_CoalOre;
      }
      else
      {
         // block with this ID is not a valid flammable block, so it has no Group and no burn duration
      } 

      return (time);
   }