London Is a Worse Nitrogen Dioxide Polluter Than Beijing | An E.U.-mandated shift to diesel cars has sent London's NO2 emissions through the roof. "It's a public-health catastrophe," says one prominent campaigner | TIME.com
This global map shows the average concentration of nitrogen dioxide in the atmosphere in 2005, as detected by the Ozone Monitoring Instrument aboard the Aura satellite. Blue indicates an observed decrease in nitrogen dioxide, and orange indicates an observed increase.
AirPi The AirPi is an automatic air quality & weather monitoring device powered by a Raspberry Pi, capable of displaying, recording and uploading information about temperature, humidity, air pressure, light levels, UV levels, carbon monoxide, nitrogen dioxide and smoke level to the internet.
Satellite data from NASA, shown above, revealed a huge reduction in nitrogen dioxide pollution from cars, trucks, power plants, in the United States between 2005 and 2011. Nitrogen dioxide is produced when gasoline gets burned in cars or coal gets burned in power plants. It's been linked to a variety of respiratory problems, and can combine with other pollutants to form smog. It's also a good proxy for pollution more generally