Kardashev Scale

Scale of civilization's energy usage. The Earth is nowhere near tapping all of its available energy resources.

Kardashev Scale = 1 means that people on Earth are using all the energy that comes from the sun.

Type = 2 means we harness all the energy of a star, such as the Sun. We would need to encircle the sun, such as a swarm of orbits like the Dyson Sphere

http://www.veronicasicoe.com/blog/2014/04/the-kardashev-scale-0-to-6/