Very visual, it enables us to see easily who are the largest carbon emitters and even the thumbnail on your left shows the huge importance the USA and China have.
According to this rating, France is the 13th largest emitter, despite being the fifth economic power and 20th most populated country.
This was provided me by Climate Change Action blog, quoting itself an article from Treehugger.
To the latter :
WaPo (Washington Post) staff cartographer Nathaniel Vaughn Kelso recently highlighted the above gem, a Dorling cartogram showing the world’s carbon emissions (called “Carbon Atlas“), on his personal blog.
Here’s how Kelso describes this neat cartogram (see this site for a description of the Dorling cartogram style):
“Note how the world map below shows true geography and establishes the region color code. Graduated circles, by region, establish proportions between regions and later iterate onto the background of the Europe detail image.
Circles are labeled by rank on the main map (Europe clip below). Graduated circle labels could have been augmented with the 2 digit county code in many cases (e.g. 64CH for Switzerland). Use the table at the very bottom to lookup the rank number by continent to get the country name, total tons of C02 emissions, and ton-per-person equivalent.”
Via the Climate Change Action blog