The land available for housing by type of owner corresponds to all the vacant land within the residential areas and to 75% of vacant land within the mixed-used areas in the municipalities' general land use plans (PAG) (in hectares). The type of owners are on the one hand private owners (individuals, legal entities, co-ownerships) and on the other hand public actors (municipalities, State, Funds, SNHBM). This is a theoretical potential, independently of the will of the owners to develop the land. The data sources are the digitalized cadastral parcels, the orthophoto-images and the type of owner from the "Administration du Cadastre et de la Topographie", as well as the PAG and PAP of the municipalities digitalized in collaboration with the Ministry of Interior.

The land area used for residential production corresponds to the land plots which were vacant in 2010 and on which stood a building in 2016 within the residential and the mixed-used areas in the municipalities' general land use plans (PAG). Thus, only the areas on which a building was constructed (whether it is inhabited or not) are taken into account in the land consumption, without considering the plots on which roads, car parks etc. were build. These areas were captured by comparing the orthophoto-images. The data sources are the digitalized cadastral parcels and the orthophoto-images from the "Administration du Cadastre et de la Topographie", as well as the PAG and PAP of the municipalities digitalized in collaboration with the Ministry of Interior.

This layer contains the transaction prices for the apartments under construction (VEFA - "ventes en état futur d'achèvement") as recorded in the notarial deeds. The prices are expressed at municipal level in euros per square meter and refer to the average price over a one-year period. The number of transactions reported corresponds to the number of sales after selections and processing. The statistics are presented with a 3% VAT rate (within the limit of the total tax benefit capped at 50 000 euros per dwelling). The prices are calculated from data provided by the "Administration de l'Enregistrement et des Domaines".

This layer contains the rents of the apartments as they are advertised in the real estate ads. Thus, only new rents are taken into account and not current contracts. Rents are expressed at municipal level in euros per square meter and refer to the average rent over a one-year period. The number of observations reported corresponds to the number of offers after selections and processing. Rents are calculated from data of real estate advertisements published in the daily and specialized press and on the Internet.

This layer contains the transaction prices for the existing apartments as recorded in the notarial deeds. The prices are expressed at municipal level in euros per square meter and refer to the average price over a one-year period. The number of transactions reported corresponds to the number of sales after selections and processing. The prices are calculated from data provided by the "Administration de l'Enregistrement et des Domaines".

The method used for the measurement of dust deposition is the standard Bergerhoff method with the corresponding collection instrument. The measurement points of the Bergerhoff network are almost always located near industrial sites known for their high dust emissions (e. g. steel and metal-producing industries).

The geostatistical interpolation map shows in real time the most probable distribution of the pollutant ozone between the different fixed measurement points that make up the telemetric network of Luxembourg, this at a resolution of 1km2.

The land area in which rebuilding occurred corresponds to the land plots on which a building existing in 2010 was demolished and replaced by a new building by 2016 (whether it is inhabited or not), within the residential and the mixed-used areas in the municipalities' general land use plans (PAG). These areas were captured by comparing the orthophoto-images. The data sources are the digitalized cadastral parcels and the orthophoto-images from the "Administration du Cadastre et de la Topographie", as well as the PAG and PAP of the municipalities digitalized in collaboration with the Ministry of Interior.

The land available for housing corresponds to all the vacant land within the residential areas and to 75% of vacant land within the mixed-used areas in the municipalities' general land use plans (PAG) (in hectares). This is a theoretical potential, independently of the will of the owners to develop the land. The data sources are the digitalized cadastral parcels and the orthophoto-images from the "Administration du Cadastre et de la Topographie", as well as the PAG and PAP of the municipalities digitalized in collaboration with the Ministry of Interior.

In 2018, the environmental administration organised a nationwide air quality measurement campaign in collaboration with 36 participating municipalities and myenergy. More specifically, it is a national measurement campaign of NO2 by passive tubes in the context of the national air quality program and the "Klimapakt Loftqualitéit". The campaign aims to raise awareness and inform municipalities and their inhabitants about the air quality in their respective municipalities, motivate municipalities to contribute to improving their air quality, and demonstrate the efforts undertaken by municipalities for future communications.