It is no surprise, then, that buildings in the city centre require particularly efficient filter systems which keep the hazardous fine dust away from users. Particulate matter is also becoming an issue in international standards. While filter classification to EN 779 was based on a particle ...
Geographical area stratification considered the eight so-called Nielsen areas, according to the eight geographical areas previously outlined by annual Spanish National Food Consumption Surveys [22]: Northeast and Balearic Islands; East Coast; South; Centre of Spain; Northwest; North; Barcelona (...
000 inhabitants. Geographical area stratification considered the eight so-called Nielsen areas, according to the eight geographical areas previously outlined by annual Spanish National Food Consumption Surveys [22]: Northeast and Balearic Islands; East Coast; South; Centre of Spain; Northwest; North; ...