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The urban environment has two atmosphere layers, besides the planetary boundary layer (PBL) outside and extending well above the city: (1) The urban boundary layer is due to the spatially integrated heat and moisture exchanges between the city and its overlying air. (2) The surface of the city corresponds to the level of the urban canopy layer.
Air pollution is usually concentrated in densely populated metropolitan areas, especially in developing countries where cities are experiencing rapid growth and environmental regulations are relatively lax or nonexistent. Urbanization leads to a rapid rise in premature mortality due to air pollution in fast-growing tropical cities. [321]
Urbanization commonly occurs in cities with low and middle income communities that have high population density and a lack of understanding of how climate change, which degrades their environment, is affecting their health. Within urban settings, multiple climate and non-climate hazards impact cities which magnify the damages done to human health.
The ACS study correlated air pollution data, lifestyle factors, and death records for a sample of 552,138 adults in 151 urban areas followed over a 16-year period and concluded, just as the original had done, that breathing particulate pollution increases a person's risk of death: "Particulate air pollution was associated with cardiopulmonary ...
Jean-Marie Pelt's 1977 book The Re-Naturalized Human, [8] Brian Davis' 1978 publication Urbanization and the diversity of insects, [9] and Sukopp et al.'s 1979 article "The soil, flora and vegetation of Berlin's wastelands" [10] are some of the first publications to recognize the importance of urban ecology as a separate and distinct form of ...
Looking down from the Hollywood Hills, with Griffith Observatory on the hill in the foreground, air pollution is visible in downtown Los Angeles on a late afternoon.. Air pollution is the introduction of chemicals, particulate matter, or biological materials into the atmosphere that cause harm or discomfort to humans or other living organisms, or damage ecosystems.
AP 42 Compilation of Air Pollutant Emission Factors: 1968: Pollution: air pollution: An Appeal to Reason: A Cool Look at Global Warming: Nigel Lawson: 2008: Global warming: ISBN 978-0-7156-3786-9 ISBN 978-1-59020-084-1: Aqueous Wastes from Petroleum and Petrochemical Plants: Milton R. Beychok: 1967: Waste: oil refinery and petrochemical wastewaters
Over the past decade air pollution has increased in India significantly. Asthma is the most common health problem faced by Indians and it accounts for more than half of the health issues caused by air pollution. [43] [44] Air pollution is believed to be one of the key factors in accelerating the onset of Alzheimer's disease in India. [45]