Mexico City bans 1.1M cars in 1st smog alert in 11 years

March 16, 2016
Mexico City's Azteca Stadium, left, is seen through a thick haze, Tuesday, March 15, 2016. The Mexico City government declared its first air pollution alert in 11 years Monday, after ozone levels reached almost twice the acceptable limit. (AP Photo/Eduardo Verdugo)

Mexico City’s Azteca Stadium, left, is seen through a thick haze, Tuesday, March 15, 2016. The Mexico City government declared its first air pollution alert in 11 years Monday, after ozone levels reached almost twice the acceptable limit. (AP Photo/Eduardo Verdugo)

MEXICO CITY (AP) — Authorities banned more than 1 million cars from the roads and offered free subway and bus rides to coax people from their vehicles as Mexico City’s first air pollution alert in 11 years stretched into a third day Wednesday.

Officials advised people to limit outdoor activity due to high ozone levels that were nearly double acceptable limits in the sprawling capital, which lies in a high-altitude valley ringed by smog-trapping volcanic mountains.

Amid a muddy brown haze, some residents covered their mouths with scarves or paper masks as they moved through the streets. Some schools kept kids indoors during recess.

Environment Secretary Alejandro Pacchiano said if conditions don’t improve, further measures may be considered such as suspending industrial activity at factories.

Mexico City Mayor Miguel Angel Mancera told Televisa news that about 1.1 million cars in the Valley of Mexico, including nearly 450,000 in the capital, were ordered off the streets under the restrictions.

According to the National Statistics Institute about 4.7 million vehicles were registered in the capital in 2014, the most recent year for which figures are available.

Mexico City used to regularly reach high smog levels, but air quality has improved significantly since the 1990s. Among other measures, rules were put in place that aimed to limit the circulation of older, more polluting vehicles, and obliged car owners to get regular smog checks.

However a court relaxed those restrictions last year in a ruling that authorities and environmentalists blame for a rise in traffic. Pacchiano said that decision put an extra 1.4 million cars a day on the streets.

Mancera has complained that cities bordering the capital do not regularly restrict vehicle use even though they contribute greatly to regional pollution. More than 20 million people are estimated to live in greater Mexico City, but only about 9 million in the capital proper.

Ozone is a component of smog that can cause respiratory problems. Mexico City’s last alert for ozone was in 2002, and the last pollution alert for air particles was in 2005.

The current ozone alert was declared Monday night.

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