ember energy data. Python code here
This graph does not show a huge change but the UK shows this can change fast https://www.reddit.com/r/dataisbeautiful/comments/1m9p3zn/uk_electricity_from_coal_oc/
original y axis time and black to green idea for coal usage idea from here https://www.reddit.com/r/dataisbeautiful/comments/1m9p3zn/uk_electricity_from_coal_oc/
by cavedave