Film School was opened, later becoming Poland's primary academy of drama and cinema. Post-war spatial and urban planning was conducted in accordance with the Athens Charter, where the population from the old core was relocated into new residential zones. However, as a result, the inner-city and historical areas fell in significance and degenerated into a slum. A number of extensive panel block housing estates (including Retkinia, Teofilów, Widzew, Radogoszcz and Chojny) were constructed between 1960 and 1990, covering an area of almost and accommodating a large part of the populace. In mid-1981 Łódź became famous for its massive hunger demonstration of local mothers and their children. After the period of economic transition during the 1990s, most enterprises were again privatised. Geography Łódź covers an area of approximately and is located in the centre of Poland. The city lies in the lowlands of the Central European Plain, not exceeding 300 metres in elevation. Topographically, the Łódź region is generally characterised by a flat landscape, with only several highlands which do not exceed 50 metres above the terrain level. The soil is predominantly sandy (62%) followed by clay (24%), silt (8%), and organogenic formations (6%) from regional wetlands. The forest cover (equivalent to 4.2% of the whole country) is considerably low compared to other cities, regions, and provinces of Poland. Climate Łódź has a humid continental climate (Dfb in the Köppen climate classification). Districts Łódź was previously subdivided into five boroughs (): Bałuty, Widzew, Śródmieście, Polesie, Górna. However, the city is now divided into 36 ('districts'): Bałuty-Centrum, Bałuty-Doły, Bałuty Zachodnie, Julianów-Marysin-Rogi, Łagiewniki, Radogoszcz, Teofilów-Wielkopolska, Osiedle Wzniesień Łódzkich, Chojny, Chojny-Dąbrowa, Górniak, Nad Nerem, Piastów-Kurak, Rokicie, Ruda, Wiskitno, Osiedle im. Józefa Montwiłła-Mireckiego, Karolew-Retkinia Wschód, Koziny, Lublinek-Pienista, Retkinia Zachód-Smulsko, Stare Polesie, Zdrowie-Mania, Złotno, Śródmieście-Wschód, Osiedle Katedralna, Andrzejów, Dolina Łódki, Mileszki, Nowosolna, Olechów-Janów, Stary Widzew, Stoki, Widzew-Wschód, Zarzew, and Osiedle nr 33. Demographics According to Statistics Poland (GUS), Łódź was inhabited by 672,185 people and had a population density of 2,292 persons per square kilometre (5,940/sq mi), Approximately 55.7 percent of inhabitants are of working age (18–64 years), which is a considerable decrease from 64.1 percent in 2010. An estimated 29.1 percent is of post-working age compared to 21.8 percent ten years earlier. In 2020, 54.39 percent (365,500) of all residents were women. Łódź has one of the highest feminisation rates among Poland's major cities, a legacy of the city's industrial past, when the textile factories