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As in many areas of the world, in Mexico ambient air pollution is a pervasive component of the lived experience. Most conspicuous in large urban centers, air pollution flows across the diverse Mexican terrain, unifying the country’s political geography while also routinely permeating international boundaries. In Mexico’s capital, air pollution is unyieldingly stagnant and often lingers in the valley for days during winter temperature inversions and periods of low wind activity. Although Mexico City has long suffered from seasonal dust pollution, a consequence of the slow, human-engineered desiccation of the lakes that once surrounded the city, as well as from pollution naturally generated by the relatively more sporadic volcanic eruptions known to afflict the city and its environs, the mid-20th century spawned an altogether different, more human pollution problem. Driven by state-sponsored industrialization, population growth, and a rise in the use of motorized transportation, a phase collectively known as the “Mexican Miracle,” from approximately the 1940s to the 1990s, Mexico City transformed into an industrial powerhouse and the most polluted city in the world, the latter status officially recognized by the United Nations during the Earth Summit in 1992. The state, dedicated to carrying out its comprehensive modernization project, had left Mexico City’s air pollution to fester for decades, framing the legal protection of the environment—atmosphere included—as antithetical to economic growth. This rhetoric pervaded the ways that antipollution laws, passed in the 1970s and 1980s, were enforced. Though they set into motion important classification and monitoring efforts, for the most part air pollution control laws were poorly executed due to bureaucratic inefficiencies and the collapse of the economy, which halted spending on environmental protection programs. Other spheres such as science and environmental activism were also important in the history of Mexico City’s experience with air pollution, as actors within these realms contributed to the creation of air pollution knowledge throughout the second half of the 20th century. In their own ways, scientists and activists discursively rendered air pollution a threat to human life and the ecological future of Mexico City. From the 1940s to the 1990s, then, dirty air connected politics, science, and environmentally minded citizens in important and intriguing ways.

The Mexican government’s civil aviation program implemented elite development strategies during a period of national reconstruction. In the decades following the revolution, political leaders and industrialists attempted to strike a balance between preserving a unique national identity and asserting their country’s place in global affairs as a competitive, modern nation. Nation builders were primarily concerned with improving the nation’s communication and transportation capabilities, although they quickly learned to exploit the spectacle of aviation through the mass media and in public ceremonies, as well. The symbolic figure of the pilot proved an adept vessel for disseminating the values championed by the country’s ruling party. Aviators validated the technological determinism underpinning the government’s development philosophy, while projecting an image of strength abroad. This article traces the trajectory of aviation development from 1920s through the 1950s. In the process it demonstrates how the social and cultural significance of technology in Mexico changed over time. The establishment of the Department of Civil Aeronautics under the Secretariat of Communications and Public Works (SCOP), in 1928, reflected the ambitions of reform-minded officials who were intent on modernizing the country. Although the onset of the Great Depression slowed aviation development for about a decade, policymakers recommitted to the technology during World War II. President Manuel Ávila Camacho (1940–1946) used it to achieve two of his primary goals: securing the country from the threat of international fascism and shifting the nation from an agrarian to an industrial economy. Wartime aid alleviated material obstacles hamstringing national aviation development, and the rapid growth of tourism to the country in 1940s and 1950s benefited commercial airlines. Presidents Miguel Aléman (1946–1952) and Adolfo Ruiz Cortines (1952–1958) touted the success of the aviation industry as a consequence of their development policies. The near financial collapse of the country’s largest airline, Compañía Mexicana de Aviación (CMA), at the end of the decade nevertheless hinted that the country’s sustained economic growth was less miraculous than officials and foreign observers liked to believe.