Atmospheric Pollution: Experience from Mexico City and Santiago de Chile

Author(s):  
Luisa T. Molina ◽  
Wenfang Lei ◽  
Miguel Zavala ◽  
Victor Almanza ◽  
Agustin Garcia ◽  
...  
2019 ◽  
Vol 11 (20) ◽  
pp. 5835 ◽  
Author(s):  
Daniel Coq-Huelva ◽  
Rosario Asián-Chaves

In recent decades, urban processes have experienced deep transformations. One of them has been the growing importance of urban sprawl. This article reviews its main features and the policies related to the paradigm of sustainability in three Latin American Megalopolises: Mexico City, Lima, and Santiago de Chile. For this purpose, we have carried out an extensive compilation of the existing academic literature. Urban sprawl in those cities cannot be understood without considering the rising housing needs of popular classes, usually addressed through the sequence settlement-parceling-building-urbanization. Simultaneously high-income groups tend to create separated and gated commodities and there is increasing spatial mobility of the middle classes. Those processes tend to generate highly segregated and increasingly patched metropolitan areas. Sustainability is framed on models of urban governance based on ecological modernization. In this context, three main sustainable policies are analyzed: water supply, green areas provision, and transport. Conclusions stress: (1) Deep changes experienced and the path-dependent element observed in the social construction of sustainability (2) Consolidation of a model of socially segregated and ecologically differentiated urban polycentrism (3) Relevance of the different megalopolises as niches of experimentation and innovation in the construction of specific forms of sustainable transition.


1987 ◽  
Vol 64 (3) ◽  
pp. 811-814 ◽  
Author(s):  
P. Larrain Navarro ◽  
P. Simpson-Housley ◽  
A. F. De Man

100 residents of Santiago de Chile took part in a study of the relationship among locus of control, trait-anxiety, and perception of air pollution. Concern over the problem of atmospheric pollution and number of antipollution measures taken was related to trait-anxiety. Locus of control was associated with variation in awareness of pollution hazard.


Author(s):  
Manuel Oyarzun ◽  
Nelson Dussaubat ◽  
Maria Eugenia Miller ◽  
Silvia Labra ◽  
Sergio Gonzalez

1992 ◽  
Vol 6 (1) ◽  
pp. 71-82 ◽  
Author(s):  
Angel Durán D. ◽  
Antonio E. ◽  
Cisneros C. y Agustín ◽  
Vargas V.

The Index of Atmospheric Purity (IAP) was used to make a preliminary evaluation of epiphytic moss response to atmospheric pollution in the urban area of Mexico City. Areal analysis indicates that there is a significant negative correlation (p < 0.5) between IAP values and SO2, NO2, NOx, Pb and temperature values of -0.45, -0.90, -0.80, -0.80, -0.90. Significant positive correlation (p < 0.05) between IAP values and O3, rainfall and relative atmospheric humidity with values of 0.70, 0.80, 0.90. Increase in atmospheric pollutants in Mexico City have promoted a gradual decrease in frequency and cover of epiphytic mosses even though some ecological factors may show the oposite effect.


2019 ◽  
Vol 185 ◽  
pp. 73-84 ◽  
Author(s):  
Ludy Núñez Soza ◽  
Pavlina Jordanova ◽  
Orietta Nicolis ◽  
Luboš Střelec ◽  
Milan Stehlík

Author(s):  
Mariana Martínez-Pérez ◽  
Francisco Arenas-Huertero ◽  
Josefina Cortés-Eslava ◽  
Ofelia Morton-Bermea ◽  
Sandra Gómez-Arroyo

Author(s):  
Carlos Mejia-Arbelaez ◽  
Olga L. Sarmiento ◽  
Rodrigo Mora Vega ◽  
Mónica Flores Castillo ◽  
Ricardo Truffello ◽  
...  

Ciclovía Recreativa is a program in which streets are closed off to automobiles so that people have a safe and inclusive space for recreation and for being physically active. The study aims were: (1) to compare participant’s spatial trajectories in four Ciclovía Recreativa programs in Latin America (Bogotá, Mexico City, Santiago de Cali, and Santiago de Chile) according to socioeconomic characteristics and urban segregation of these cities; and (2) to assess the relationship between participants’ physical activity (PA) levels and sociodemographic characteristics. We harmonized data of cross-sectional studies including 3282 adults collected between 2015 and 2019. We found the highest mobility for recreation in Bogotá, followed closely by Santiago de Cali. In these two cities, the maximum SES (socioeconomic status) percentile differences between the neighborhood of origin and the neighborhoods visited as part of the Ciclovía use were 33.58 (p-value < 0.001) and 30.38 (p-value < 0.001), respectively, indicating that in these two cities, participants were more likely to visit higher or lower SES neighborhoods than their average SES-of-neighborhood origin. By contrast, participants from Mexico City and Santiago de Chile were more likely to stay in geographic units similar to their average SES-of-origin, having lower overall mobility during leisure time: maximum SES percentile difference 1.55 (p-value < 0.001) and −0.91 (p-value 0.001), respectively. PA levels of participants did not differ by sex or SES. Our results suggest that Ciclovía can be a socially inclusive program in highly unequal and segregated urban environments, which provides a space for PA whilefacilitat physical proximity, exposure to new communities and environments, and interactions between different socioeconomic groups.


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