L. - Public or private persons operating an aerodrome defined in the first two paragraphs of I of Article 1609 quatervicies A of the General Tax Code establish, no later than December 31, 2016, a program of actions that they decide to implement. implemented to reduce greenhouse gas and atmospheric pollutant emissions resulting from direct and ground activities of the airport platform, in terms of aircraft taxiing and vehicle circulation on the platform in particular. The objective of reducing the intensity of greenhouse gases and atmospheric pollutants is, compared to 2010, at least 10% in 2020 and at least 20% in 2025. Gas intensity greenhouse effect is the ratio between the volume of emissions of these gases and the number of traffic units on the platform concerned in the same year. The reduction target applies to all of the aerodromes mentioned in the first paragraph of this I. II. - Land and air vehicles used for operational defence, security, intervention, fire and rescue missions are not affected by these action programs.