The tiny specks of blue, red, and yellow on this world map depict the global pathways of tens of thousands of cargo ships.
The interactive map, co-created by researchers from the University of London’s Energy Institute and data visualization company Kiln, shows the flow of cargo ships across the world over the course of 2012, based on “hundreds and millions of individually recorded positions.” The red dots represent huge tankers, the blue dots show dry bulk ships that move cargo like ores, and the yellow dots show ships that carry manufactured products. The map was created in order to demonstrate just how large a carbon footprint is created by the world’s cargo ships.

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