Trondheim's air

Norway spends millions in incentives for electric cars that are supposed to reduce the emissions in highly populated areas. At the same time, they allow wood burning for heating in private apartments and houses (which is active at least 9 months a year). In Trondheim, during the warmer months, instead, there are cruise ships docking every day. From morning to late afternoon, they create clouds of smoke over the city. What is the point of all this?