Emissions are the least of our worries. Have you ridden in Europe? I have. In industrialized nations there is virtually NO LAND to ride dirt bikes (or dual sport bikes) on. Germany is the worst with France, Austria, Scandinavia follow close behind. Worse every year. I did ride off road in Andorra and a bit in Southern Spain ... but very very limited. I honest to God think the Germans would shoot you off your bike for riding off road. They are very seriously ANTI dirt bike.