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The desolation of smog: World battles against air pollution

Updated: 2014-02-26 18:23 (chinadaily.com.cn)
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Mexico City

The desolation of smog: World battles against air pollution
Image of the pollution that 150 brick kilns generate in San Luis Potosi, Mexico, Dec 4, 2009. [Photo/icpress.cn] 

As a result of accelerated urbanization since the 1980s, Mexico City became one of the most heavily polluted cities in the world for a time as pollutants are further prevented from dispersing due to mountains on its three sides. The city has high concentrations of nearly every major harmful airborne pollutant, including sulfur dioxide, nitrogen oxides and carbon monoxide. By far the worst problem gripping the city is the massive cloud of smog that hangs over it almost every day. Mexico City has the highest level of ground-level ozone in the world, according to WHO.

The desolation of smog: World battles against air pollution

Effort

The desolation of smog: World battles against air pollution Ecological Balance and Environmental Protection Laws and Anti-Pollution Overall Plan were introduced

The desolation of smog: World battles against air pollution Protection of environmental resources at the strategic level of national security

The desolation of smog: World battles against air pollution Automatic air pollution monitoring system

The desolation of smog: World battles against air pollution Two-Stage Air Emergency Response Program

The desolation of smog: World battles against air pollution Scientific researches concerning environmental protection and new energy development

The desolation of smog: World battles against air pollution Green transportation like "No drive today" since 1989 and vehicles exhaust emission examination every half-year.

The desolation of smog: World battles against air pollution

Improvement

Statistics show that since the year 1990, lead levels in the air of Mexico City has fallen 90%, while suspended particles that cause asthma, emphysema, or even cancer have been reduced by 70%, and the emission of carbon monoxide and other pollutants has also plunged. The level of ozone has decreased 75% as well since 1992.

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