NY Times, September 1, 2008 - “Public discussion of complicated climate change is largely reduced to carbon: carbon emissions, carbon footprints, carbon trading. But other chemicals have large roles in the planet’s health, and the one Dr. Giblin is looking for in Arctic mud, one that a growing number of other researchers are also concentrating on, is nitrogen. In addition to having a role in climate change, nitrogen has a huge, probably more important biological impact through its presence in fertilizer.” Read more.