Atmospheric Aerosols: What Are They, and Why Are They So Important?

http://oea.larc.nasa.gov/PAIS/Aerosols.html

Aerosols and climate change

http://earthobservatory.nasa.gov/Features/Aerosols/

8 weird ways to save the Earth

http://money.cnn.com/galleries/2009/news/0911/gallery.geoengineer/index.html