Objectives: The objectives of this paper are two, the first one is to describe impact caused in population by informal transportation service Cuautepec, Mexico City and second know opinion user’s concerning security other topics interest regarding transport. Theoretical Framework: theoretical framework related public services especially those that considered have same conditions as study area a...

Exploratory field measurements in the Mexico City Metropolitan Area (MCMA) in February 2002 set the stage for a major air quality field measurement campaign in the spring of 2003 (MCMA-2003). Involving over 100 scientists from more than 30 institutions in Mexico, the United States and Europe, MCMA-2003 revealed important new insights into the meteorology, primary pollutant emissions, ambient se...

Surprisingly little is known about the effects of big-city air pollution on olfactory function and even less about its effects on the intranasal trigeminal system, which elicits sensations like burning, stinging, pungent, or fresh and contributes to the overall chemosensory experience. Using the Sniffin' Sticks olfactory test battery and an established test for intranasal trigeminal perception,...

The concentrations of peroxyacetyl nitrate (PAN) in ambient air can be a good indicator of air quality and the effectiveness of control strategies for reducing ozone levels in urban areas. As PAN is formed by the oxidation of reactive hydrocarbons in the presence of nitrogen dioxide (NO2), it is a direct measure of the peroxyacyl radical levels produced from reactive organic emissions in the ur...

Impact of model resolution on chemical ozone formation in Mexico City; application of the WRF-Chem model X. Tie, G. Brasseur, and Z. Ying National Center for Atmospheric Research, Boulder, CO USA Climate Service Center, Hamburg, Germany Department of Earth and Atmospheric Science, York University, Toronto, Canada Received: 1 April 2010 – Accepted: 8 April 2010 – Published: 16 April 2010 Corresp...