Type I: A civilization capable of harnessing and utilizing all the energy available on its home planet, including all forms of renewable and non-renewable energy (e.g., solar, wind, geothermal, fossil fuels). This would require global cooperation and advanced technology to manage planetary resources efficiently. Estimated energy use: ~10^16 watts. Humanity is currently below Type I, roughly at 0.7 on the scale, as we don’t yet fully harness Earth’s energy.