Abstract. In the Flemish region of Belgium, yearly environmental reports (MIRA) are made on the status and evolution of the environment and its policy. Since 1996 light pollution and light impediment are among the topics considered. By using indicators which can be compared in the different reports it is possible to estimate the evolution of light pollution and light impediment. Suggested changes in lighting policies could save the Flemish region as much as 18 million EURO per year.
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