The Nationsâ€™ CO2 Emissions
The visualization shows the CO2 emissions from the consumption of energy of around 200 countries. The relative amount is represented by the size of the circles. The left foot shows the total emissions per country, the right foot the emissions per person.
This viz is a REMAKE of Stanford Kay Studio's graphic, which can be found here: http://stanfordkaystudio.com. I find it very well-made and got intrigued to rebuilt it with code in order to add interactive functionality, which helps to get the message across.