COLUMBIA UNIVERSITY / NASA / NOAA / SCIENCE PHOTO LIBRARY COLUMBIA UNIVERSITY / NASA / NOAA / SCIENCE PHOTO LIBRARY
Animated globe showing the human footprint of transportation routes on land, in the air and by sea. The underlying global map shows nighttime lights visible from space, revealing areas of habitation and energy use. The red lines represent 87,000 daily flights connecting cities and cultures around the world. Blue lines represent the paths of 3500 commercial shipping vessels over the course of a year (although that only represents 10% of the total ocean shipping traffic). Green lines represent the world's roads, used by over one billion motor vehicles. They are notable by their absence from deserts, forests and mountain ranges. This data set shows the interconnected nature of the world and hints at how much energy is used to move people and goods around the planet's surface.
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