Nitrogen as a Greenhouse Gas

During our discussion in class today (Sept. 16), professor Hirsch mentioned that the nitrogen we are consuming in the form of artificial fertilizers is giving off NO2 which is, as we learned today, 200x more powerful as a greenhouse gas than CO2. This boggled my mind because I always hear about CO2 emissions being a major concern to focus groups, but this is the first I've heard of NO being an issue.