Nitrous oxide, popularly known as a laughing gas has emerged as an important gas for environmental sustainability. In the troposphere, N2O is a chemically inert gas, but acts as a potential greenhouse gas. The greenhouse effect of N2O was first reported by Yung et al. (1976). Global warming potential of N2O, over a time horizon of 100 years, is measured 296 times that of CO2 (Ramaswamy et al. ... [Show full abstract] 2001). Therefore, an increasing trend of atmospheric N2O is a serious concern, although N2O emission is very low as compared to CO2, the most abundant greenhouse gas in the atmosphere (IPCC 1996a). Nitrous oxide emission from 1750 to 2000 has caused an atmospheric radiative forcing of 0.15Wm-2 or 6% of the enhanced radiative forcing by well-mixed greenhouse gases during this time, equivalent to 2.43Wm-2. While other greenhouse gases, like CO2, CH4 and halocarbons, have contributed 1.46, 0.48 and 0.34Wm-2, respectively. Thus, global average surface temperature (the average of near surface air temperature over land and sea surface temperature) has increased by 0.6 ± 0.2°C over 20th century (IPCC 2001).