Ranking G-20 Nations by CO2 Emissions
This example presents data relating to CO2 emissions by G-20 countries.
Rather than presenting absolute values, each graphic ranks the G-20 nations from 1 (the worst) to 19 (the twentieth member of the G-20 is the EU) for each given year according a specific CO2 emissions criterion: cumulative emissions since 1960 (top), annual emissions (middle) and annual emissions per capita (bottom).
On page load each graphic presents data in the form of a bumps chart. Clicking on the title of a chart will simplify the data to a slopegraph, presenting only the first and last ranking values for each country. (Thus the cumulative emissions graphic effectively compares emissions for 1960 with all emissions from 1960 onwards.) Click the title again to return to the bumps chart.
Because criss-crossing lines can be difficult to follow, there is also the option to highlight a country's line in a graphic by clicking on either of its labels. Click either label again to remove the highlighting. Multiple countries can be highlighted if desired.
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I've written a blog post discussing the construction of the above graphics which can be found here.
The data was obtained from the Global Carbon Atlas website. Their sources are given as:
Fossil Fuel Emissions
CDIAC: Boden, TA, G Marland, and RJ Andres. 2013. Global, Regional, and National Fossil-Fuel CO2 Emissions. Carbon Dioxide Information Analysis Center (CDIAC), Oak Ridge National Laboratory, US Department of Energy, Oak Ridge, Tenn., USA doi:10.3334/CDIAC/00001_V2013 http://cdiac.ornl.gov/trends/emis/meth_reg.html
UN: United Nations Population Division - World Population Prospects: The 2012 Revision, 2013 http://esa.un.org/unpd/wpp/Excel-Data/population.htm