NASA has released a striking visualization of how carbon dioxide flows around the world. In the simulation, plumes of the greenhouse gas gush into the atmosphere from major industrial centers, swirling from continent to continent on the winds of global weather systems.

The simulation, which took 75 days to create on a supercomputer at NASA's Goddard Space Flight Center in Greenbelt, Maryland, depicts CO2 emissions from May 2005 to June 2007. Its superhigh-resolution mapping—64 times as great as the average climate model—dramatically illustrates two often neglected facts.

The first is that CO2 emissions come almost exclusively from the Northern Hemisphere. The deep red plumes of the normally invisible gas flow from clusters in the United States, Europe, and Asia, eventually pooling