I have been working with processing.js but wanted to learn a little about d3js for visualizations, so took a look at Mike Bostock's d3.js plugin for making Sankey diagrams.
So I pulled down two documents that had energy flow diagrams for Canada:
I extracted the data from these diagrams and built these interactive Sankey energy flows:
Note that these two documents are looking at slightly different views of energy flows (and 2007 does not include
Uranium), so can't be compared directly.
If you have any (preferably Canadian) datasets that could be presented in this fashion, let me know and we can collaborate in getting them into this form.
Addendum: 2012 10 26 22:28: Wow! The Economist's blog
Graphic detail: Charts, maps and infographics has an article about this post:
Charting Canada's energy: Go with the flow
Related article on energy flows using Sankey diagrams:
Visualizing Alberta energy flow, emissions and water use by sector