On World Water Day, as on every other day, some 2.5 billion people are "doing their business" somewhere other than in a toilet or latrine. Thatis not a statistic many people want to examine too closely, but it is crucial data for efforts to meet the Millennium Development Goals on improving global sanitation and reducing child mortality.
public health
Video: Promoting the Importance of Sanitation on World Water Day
Audio: Sen. Boxer Calls White House Editing of Climate Testimony 'Dangerous'
Sen. Boxer, chairwoman of the Senate Environment and Public Works Committee,  and other Senators respond to White House editing of the testimony given by Dr. Julie Gerberding, on the health effects of climate change on public health.
Free online course material: "Water and Sanitation in Emergencies"
Water and Sanitation Needs in Complex Humanitarian Emergencies is an excellent series of MP3's of lectures by Leslie Roberts (who led the civilian deaths in Iraq study).
I found this series extremely interesting (entertaining even) and informative.
Video Of The Senate Climate Hearing Featuring CDC Chief Dr. Gerberding
This is the hearing featuring CDC chief Dr. Julie Gerberding, the testimony of whom was censored by the Bush administration. The video includes information in the Q&A which the administration hoped to avoid exposing.

Cell Phones, Power Lines Raise Cancer, Brain Damage Risk: Expert Group
Experts Say Safety Standards For Electromagnetic (EMF) Radiation Are Too Low