This is a cool video on CO2 emissions from the USA. It is from Purdue University, where a group of researchers have developed a tool for high resolution mapping and analysis of fossil fuel based CO2 emissions from power plants, traffic, industrial activity, and the residential/commercial energy consumption.
The technical significance of the work is probably best stated by Kevin Gurney, a leader of the project (source: Green Car Congress):
Before now the only thing policy-makers could do was take a big blunt tool and bang the US economy with it. Now we have more quantifiable information about what is happening in neighborhoods, on roads and in industrial areas, and track the CO2 by the hour. This offers policy-makers something akin to a scalpel instead.
—Kevin Gurney, assistant professor of earth and atmospheric science at Purdue University and leader of the project
Posted by Bilal Zuberi 
