Type I

A Type I or K1 civilization has mastered all the energy available to their home planet, available from a neighboring star. It extracts its energy, information, and raw materials from fission and fusion power, and renewable resources; is capable of interplanetary spaceflight and communication; mega-scale planetary engineering; medical breakthroughs to eliminate disease and slow ageing; multiplanetary government and interplanetary trade; species is tech augmented; but is still vulnerable to extinction.

Michio Kaku mentioned in his book Physics of the Future: "Type I civilizations harvest planetary power utilizing all the sunlight that strikes their planet. They can, perhaps, harness the power of volcanoes, manipulate the weather, control earthquakes, and build cities on the ocean. All planetary power is within their control.”