Science Talk is a weekly science audio show covering the latest in the world of science and technology. Join Steve Mirsky each week as he explores cutting-edge breakthroughs and controversial issues with leading scientists and journalists. He is also an articles editor and columnist at Scientific American magazine. His column, "Antigravity," is one of science writing's great humor venues. Also check our daily podcast from Scientific American : "60-Second Science." To view all of our archived podcasts please go to www.scientificamerican.com/podcast
Allegedly, "indoor air pollution" is a cause of air pollution in the developing countries, created from dirty cooking fires. Although by itself a very small contributor, it has a large impact in places where the majority of population is causing it.
Why is China getting significantly better in their pollution levels?
A few years ago China started to invest heavily into lowering their levels of pollution by reducing coal usaging and ramping up renewables, which is already seeing a significant impact vs. those countries that haven't.
PM 2.5 refers to the size of the particle 2.5 microns in size. It is very, very tiny, and completely invisible. These particles have very powerful health impacts as they penetrate all the way into our bodies.