Norwegian emissions were estimated to be 14,2 thousand tonnes in 1995. Almost half of the Norwegian emissions come from fertilizers in the agricultural sector. O has decreased by 7 per cent since 1989 due to a decrease in the production of nitric acid. This gas has a GWP of 310 times that of CO 2 . CO 2 -equivalents.
Time lag Some greenhouse gases remain in the atmosphere for decades and even centuries at a time.
Consequently, the planet may continue to warm, even if we stopped producing all man-made emissions at once. The effect of this global warming on sea level rise and other ecosystem changes could be dramatic.