Using new, high-resolution global satellite maps of air quality indicators, NASA scientists tracked air pollution trends over the last decade in various regions and 195 cities around the globe. The United States, Europe and Japan have improved air quality thanks to emission control regulations, while China, India and the Middle East, with their fast-growing economies and expanding industry, have seen more air pollution.
Scientist Bryan Duncan and his team examined observations made from 2005 to 2014 by the Ozone Monitoring Instrument aboard NASA’s Aura satellite. One of the atmospheric gases the instrument detects is nitrogen dioxide, a yellow-brown gas that is a common emission from cars, power plants and industrial activity. Nitrogen dioxide can quickly transform into ground-level ozone, a major respiratory pollutant in urban smog. Nitrogen dioxide hotspots, used as an indicator of general air quality, occur over most major cities in developed and developing nations.
This video is public domain and can be downloaded at: Goddard Media Studios
Please read how Massive Cruise Liners Emit more than 376 Million Cars! – Experts Call for Action.
Disclaimer: This video is intended for informational purpose only. This may not be construed as a news item or advice of any sort. Please consult the experts in that field for the authenticity of the presentations.
Source: NASA Goddard on YouTube
