ECOLOGY
ENVIRONMENTAL ISSUES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The dense urban population
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It is surrounded by mountains, that traps in air pollutants
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The Amazon River filling with the pollution from factories
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The citizens of Mexico City having higher medical costs due to breathing bad air
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Detailed explanation-1: -Located in the crater of an extinct volcano, Mexico City is about 2, 240 metres above sea level. The lower atmospheric oxygen levels at this altitude cause incomplete fuel combustion in engines and higher emissions of carbon monoxide and other compounds. Intense sunlight turns these into higher than normal smog levels.
Detailed explanation-2: -In additions to trapping pollutants in its bowl-like landscape, Mexico City is also at a high altitude, nearly 7, 400 feet above sea level, which increases levels of solar radiation. In turn, that stimulates the formation of ozone.
Detailed explanation-3: -Population growth, increasing motorization and industrial activities, a constrained basin and intense solar radiation combined to cause intense air-quality problems of both primary and secondary pollutants.
Detailed explanation-4: -This was partly due to Mexico City’s high altitude (7382 ft above sea level), which causes its oxygen levels to be 25% lower. Carbon-based fuels also do not combust completely. Other factors include the proliferation of vehicles, rapid industrial growth, and the population boom.