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Among the most targeted species for obtaining palm hearts, Euterpe edulis, popularly known as Juçara palm hearts, stands out and is threatened with extinction. The rational use of other palm trees for the production of palm hearts has been one of the alternatives to reduce the pressure of exploitation on the juçara palm: Archontophoenix alexandrae, Bactris gasipaes, Euterpe oleracea. This narrative literature review aims to discuss the four main palm tree species in Brazil. It is noted that despite the risk of extinction, there is still illegal and clandestine extraction of the Euterpe edulis species. The species of the same genus, E. oleracea, has significant cultivation in the northern region, but mainly due to the use of the fruit. Archontophoenix alexandrae is an exotic species that has adapted well to Brazil, and I offer a quality palm heart in the Brazilian market. The most cultivated species today is peach palm, it has advantages such as high tillering and shorter cultivation time. [ABSTRACT FROM AUTHOR]

Current paper analyzes the housing panorama in Brazil and focuses on social houses within the context of irregular occupation. Profound issues may be evidenced which are produced by environmental impact of such occupations on the sustainability of urban centers and the occurrence of urban dispersion and exclusion of the population. The importance of public policies is highlighted that aims at changing such reality to materialize the right to the city included in the Brazilian Constitution. A quality-quantity research has been undertaken on bibliographic and documental review on habitational deficit detected by the Fundação João Pinheiro (FJP) for the year 2019, selected through a case study on the occupation of the area known as Arroio do Padre in Ponta Grossa PR Brazil. A survey was obtained on the Brazilian habitational issue which revealed the interference of the scene in the sustainability of urban centers. [ABSTRACT FROM AUTHOR]