. . . . "Technology in the World of Avatar"@en . . . . "In addition, technologies in general advanced differently based on bending. Some examples include the earthbending-powered monorail of Ba Sing Se and the use of lightning generation as a source of energy for power plants, applied extensively in Republic City."@en . "* Fire Nation drill\n* Hot air balloon\n* Waterbending-powered submarines"@en . "Technology and inventions"@en . . "Fire Nation drill"@en . "In addition, technologies in general advanced differently based on bending. Some examples include the earthbending-powered monorail of Ba Sing Se and the use of lightning generation as a source of energy for power plants, applied extensively in Republic City."@en . .