This week the global plastics flows topic made the news and social media with the publication of the EU Plastics Strategy and Chancellor Philip Hammond presenting the United Kingdom’s plan for tackling plastic waste.

Ellen MacArthur Foundation has long been active in research and awareness building in this field. It aims at supporting a transition to a circular economy. The foundation tweeting under @circulareconomy contributed this Sankey diagram. It is from a 2016 report they produced together with the World Economic Forum and McKinsey.

The Sankey diagram shows indeed, that “today, plastic packaging material flows are largely linear”. This beautifully crafted diagram had already caught my attention back in 2016 when I first saw it.

However, I had this subtle feeling that something was wrong here. Not regarding the content or the data … but rather that something wasn’t OK in the Sankey diagram, Just my gut feeling. Now, seeing the Sankey diagram again in the above tweet this week, I finally sat to quickly do a remake of this Sankey diagram. Here it is:

I stuck to the original layout and design as closely as possible, using the same color codes and even the white all caps font. While transfering the numbers (all percentage values, so no issue there), it immediately became clear to me what caused my irritation. Can you identify it yourself by comparing the two pics?

Won’t give it away now and wait for your comments. Will post the answers to this small ‘spot-the-difference contest’ here next week.

[Edit 24 Jan] Blog reader ‘First!’ was the first to comment and point out that the 2% recycling flow does not seem to be to scale (i.e too wide / overemphasized) in the Sankey diagram published by Ellen MacArthur Foundation, and possibly the same issue with the two arrows representing 14% each.

Baidu Zhidao (“Baidu Knows”) is the Chinese version of a Q&A website (like quora.com or answers.com), where users can post a question and others from the community answer it.

Here’s someone asking whether there is a China-made Sankey diagram software. This nice diagram is shown to explain what a Sankey diagram looks like. Please don’t ask me what is actually visualized here…


Source: Baidu Knows (百度知道)

The last weeks have been very busy, so I am just quickly firing off a few more Sankey diagrams from the depth of my hard disk before heading into the holiday season.

This one in German, showing the percentage breakdown of energy flows in a company. Haven’t noted the source, sorry.

I was pointed to a Sankey diagram in the Wikipedia article on ‘Income Statement’. This figure created by Adrián Chiogna. The labels are in Spanish, but one can nevertheless understand ‘Costs’, ‘Marginal Contribution’ and ‘Net Result’. Click to enlarge for details.


(Source: Wikpedia article on ‘Income Statement’, Adrián Chiogna)

This Sankey diagram can be considered a distribution diagram as it shows how net interest income and other operating income of Bank Muscat in 2011/2012 are split into operating expenses and net profit.


(Source: Times of Oman Graphics)

Only at second sight I found out that this is actually a year-on-year comparison of the figures for H1/2011 and H1/2012. The light yellow flows are for the previous year, the dark orange flows for the other year, indicating an operating profit increase of 2.6 Mio Rials.

A comparison of different Ammonia production technologies is made in a post on ‘Comparative studies of ammonia production, combining renewable hydrogen with Haber-Bosch’ by Trevor Brown on the Ammonia Industry blog.

It also features this these Sankey diagrams from an Italian research study by Fratelli et.al.


(published under CC BY 4.0)

All diagrams relate to the production of 1 kg of ammonia (NH3). The authors in their “research examined three cases for renewable hydrogen production, including biomass gasification (Case A), electrolysis of water using solar or wind power (Case B), and biogas reforming (Case C), and compared these sustainable hydrogen sources against the traditional steam methane reformation of natural gas (Case 0)”.

Blue flows represent electrical energy, red flows are heat energy, including the losses (off-heat). Green flows show chemical energy embodied in the product and the feedstock.

For the original study check Fratelli et al: A system approach in energy evaluation of different renewable energies sources integration in ammonia production plants. In: Renewable Energy, Volume 99, December 2016, Pages 472-482.

Couldn’t help but laugh, despite the seriousness of the topic.

Lazaro Gamio of Axios, a “new media company delivering vital, trustworthy news (…) with expertise, voice AND smart brevity”, has created this Sankey diagram infographic to illustrate the Twitter attacks by Trump and who they were targeting. Shown in a blog post by Axios’ Stef Knight.


via Dataviz blog

Very comical use of Sankey diagrams. I love the red tie and just imagine how it will continue to move out to the right shoulder as POTUS’ Twitter attacks on the media continue. Great!

A rather rare find is this Sankey diagram from Iran, posted on the e!Sankey forum.

Those who don’t read Persian, like me, can just enjoy the visual aspect of this Sankey diagram. The diagram most likely depicts energy flows as I can identify the word energy انرژی