The Kardashev Scale Is Not Really Valid

Carl Sagan estimated that we're like a type 0.7 civilization on the Kardashev scale. We are about a factor of 10,000 below officially being stage one crowned by the galactic empire as a baby civilization age one. In the last decade energy use has gone up by 2.3% every year every year and so people estimate that if we increase our energy use every year by 3% then in 150 or 200 years we would be at type 1 civilization.