Type 0: This is where we're at. A type 0 civilization uses things like fossil fuels (Oil, Coal) and may use limited renewable resources as energy.

Type 1: A planetary civilization, we're 100 years away from being a planetary civilization. They're eco-friendly using renewable energy resources (geothermal, wind, solar, etc..)

Type 2: A stellar civilization, we're about 1,000-5,000 years away from being a type 2 civilization. They are mainly reliant on their mother star and create Dyson Shells, or Dyson Spheres (Basically solar panels that collect 70-99% of energy) and are essentially immortal. A type 2 civilization can only die from the death of the universe itself.

Type 3: A Galactic Civilization. They have not really an infinite amount of power but a damn lot of it. They have the power from billions of suns, and billions of planets. They are immortal, and even the death of the UNIVERSE wouldn't be a problem to them. They have perpetual motion machines, Advanced AI, the ability to manipulate black holes. We're about 100,000-1,000,000 years away from being a Type 3 civilization.