Biobased products have emerged in today’s economy in many forms, from corn-based plastic bottles to soy-based lubricants to fuels from both. In most cases, biomaterials exhibit benefits in the form of fewer greenhouse gases emissions and less nonrenewable fossil fuels usage when compared to their petro-counterparts. Research on the sustainability and environmental implications of these renewable fuels and products has been measured primarily based on reductions in emissions related to the C cycle (greenhouse gases and fossil fuels). Important tradeoffs in the N cycle are being neglected, such as eutrophication and hypoxia caused primarily in the US by agricultural runoff. As society increases its reliance on bio-based feedstocks, it is important to critically examine these non-carbon based environmental stresses and to determine methods for reducing negative effects and alterations to the N cycle. This presentation compares the C and N emissions and resultant impacts for a variety of biobased products (i.e. ethanol, biodiesel, plastics, and lubricants) from a variety of feedstocks (i.e. corn, corn stover, soybeans, switchgrass, sugar cane, rapeseed, kenaf, algae, woody biomass, sorghum) with respect to many environmental impacts of concern, including human health and eutrophication (and global warming). Using a combination of environmental modeling approaches with life cycle methodology and Monte Carlo Analysis, this presentation will explore the tradeoffs involved in transitioning from petro-products to bio-based products.