Write a 300-word analysis of two or three ways in which the sources (i.e., biomass, coal, petroleum, etc.), amounts (watts) or uses to which power is applied (residential/commercial, industrial, and transportation have changed over time. Be specific regarding the time frames that you write about. Use the information from the interactive Sankey diagram. It can be found here: https://us-sankey.rcc.uchicago.edu/ 

Hint: click Pause on the timeline at the bottom of the page and then manually scroll the timeline to pause on the specific dates or date ranges you want to examine