# Isothermal compression and expansion compressors * Compressors use 7% of the worlds energy * Compressors are an example of an underlying tech <!-- #case-study/possible-gem --> [Web URL for this note](http://notes.benjaminreinhardt.com/Isothermal+compression+and+expansion+compressors) [Comment on this note](http://via.hypothes.is/http://notes.benjaminreinhardt.com/Isothermal+compression+and+expansion+compressors)