Smog-choked Paris forces half of cars off roads

Air quality monitors warn that toxic particulates in the air in Paris could go over the recommended maximum
Air quality monitors warn that toxic particulates in the air in Paris could go over the recommended maximum

French authorities will on Monday put in place emergency traffic-limiting measures in Paris, as the City of Light and much of northern France suffers from a choking smog.

City mayor Anne Hidalgo had asked authorities to prevent one in every two cars from taking to the capital's streets and make all temporarily free in a bid to drive down pollution.

"I am delighted the state has agreed to put in place a partial driving ban on Monday, which I have been requesting for several days," Hidalgo wrote Saturday on Twitter.

Only vehicles with number plates ending in an odd number will be allowed to drive, though exceptions exist for vehicles like taxis, and ambulances.

Public transportation is to be free until at least Monday in Paris and its surrounding towns in an effort to force pollution down by coaxing drivers to give up their cars for a few days.

Similar emergency measures were last implemented almost exactly a year ago—on March 17—during a particularly bad spike in the .

On Saturday, air quality monitors predicted that concentrations of potentially dangerous particulates in the air could again go over the recommended maximum.

In Paris, authorities measure the concentration of particulates with a diameter of less than 10 microns—so-called PM10—in the air to determine pollution levels.

These particulates are created by vehicles, heating and heavy industry, and include the most dangerous particles that measure less than 2.5 microns in diameter, which can penetrate deep into the lungs and the blood system and can cause cancer.

The safe limit for PM10 is set at 80 microgrammes per cubic metre (mcg/m3).

According to a 2011 World Health Organisation report, the planet's most polluted city was Ahvaz in Iran with an average of 372 mcg/m3.

Beijing had an average of 121 mcg/m3, while Paris was measured at 38 mcg/m3.


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Pollution-choked Paris introduces emergency traffic measures

© 2015 AFP

Citation: Smog-choked Paris forces half of cars off roads (2015, March 21) retrieved 15 September 2019 from https://phys.org/news/2015-03-smog-choked-paris-cars-roads.html
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Mar 21, 2015
No electric vehicles! The Deniers do not like them.

Sell them a Trabant.

Mar 21, 2015
So smog, much more powerful than CO2, consider every country in the world without clean air/anti smog laws (err most of them), now consider what's really causing global change; a tiny change in a nominal GHG, or a world full smog and soot?
Or is heat what is causing warming?
Does insulation (GHG) cause heat? No. Not this side of Mars/Venus.
Does heating cause heat? Yes.

Mar 22, 2015
At least the measures are only for a few days...

IIRC, when Athens (Greece) introduced a similar scheme for the whole Summer, people emptied the 'used car' sales for a second car with opposite plate.

The influx of badly maintained, smoky old 'bangers' *increased* city pollution rather than reducing it...

FWIW, global warming / cooling may not be relevant to such persistent smog as the stuff may create its own micro-climate beyond any effects due to 'temperature inversion'...

Mar 22, 2015
Water_Prophet claimed
So smog, much more powerful than CO2, consider every country in the world without clean air/anti smog laws (err most of them), now consider what's really causing global change; a tiny change in a nominal GHG, or a world full smog and soot?
U have claimed "4 technical degrees" incl Physical Chemistry, can't u be properly quantitative & definitive, if u cannot work it out it in W/m^2 despite being informed of the formula, at least to find a scholarly article/journal on the details, Y not ?

Water_Prophet asked
Or is heat what is causing warming?
Why not show it, in W/m^2 ?

Water_Prophet claimed
Does insulation (GHG) cause heat? No. Not this side of Mars/Venus
Beg Pardon, see how much CO2 on Mars/Venus, Y can't U prove CO2 is anemic in the correct units of W/m^2 then U can apply it to Mars/Venus - Y not ?

Water_Prophet the idiot
Does heating cause heat? Yes.
Doh but, Y can't u, with many degrees show it re CO2 in W/m^2 ?

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