These standards have to be transferred into national law, recommendations are voluntary. Engine manufacturers will follow these rules. These two substances are the main contributors to combustion-related air pollution, predecessor of ozone, and they are explicitly designated for reduction in the National Clean Air Policy. Because fuel efficiency has a very high priority in aircraft engine design by definition, it was believed that CO 2 needs not be taken as a factor for incentive in this context. The characteristic emission data for most aircraft engines can be found in special data bases.
Several factors have to be taken into consideration for the calculation.
Then the surcharge was added. The revenues were therefore not increased. The share of the costs that are covered by the emission surcharge depends on the ecological benefit of the measure. The costs for the different measures amount to approx. As it is not possible to budget long-term expenditure and income very accurately, unused funds or a shortage of a given year will be considered in the calculation of the following years.