NASA is tracking air pollution with a new tool called TEMPO, which stands for Tropospheric Emissions: Monitoring of Pollution. This instrument will be placed aboard a geostationary satellite and will monitor air pollution levels across North America every hour. 

TEMPO will be able to detect the levels of common air pollutants, such as nitrogen dioxide, ozone, and particulate matter, in real-time and at a high spatial resolution.

The data collected by TEMPO will be made available to the public and policymakers, which will help improve our understanding of air pollution and its impact on human health and the environment.

NASA hopes that TEMPO will help identify pollution hotspots and lead to better policies and regulations to reduce pollution levels.

Overall, TEMPO has the potential to be a powerful tool in the fight against air pollution. By monitoring pollution levels in real-time, we can take steps to reduce our impact on the environment and improve public health.