Guidelines International Ozone 
Green Car Congress
APRIL 30, 2010
The US, Canada, and Mexico have submitted a proposal to strengthen climate protection under the Montreal Protocol— the international treaty that phases out the production of a number of substances responsible for ozone depletion. The proposal targets the production and use of HFCs, a group of “super” greenhouse gases.
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FEBRUARY 5, 2015
The International Maritime Organization’s ( IMO ) regulations on pollution from ships are found within the International Convention on the Prevention of Pollution from Ships ( MARPOL 73/78 ). MARPOL Annex VI sets limits on NO x and SO x emissions from ship exhaust, and prohibits deliberate emissions of ozone-depleting substances.
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Green Car Congress
SEPTEMBER 25, 2021
New WHO has issued new Global Air Quality Guidelines (AQGs) that reduce levels of key air pollutants, some of which also contribute to climate change. Recommended 2021 AQG levels compared to 2005 air quality guidelines. When action is taken on these classical pollutants—particulate matter (PM), ozone (O?), Source: WHO.
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FEBRUARY 11, 2020
Daily exposure to ground level ozone in cities worldwide is associated with an increased risk of death, according to the largest study of its kind, published in an open-access paper in The BMJ. Ground level ozone is a highly reactive gas commonly found in urban and suburban environments, formed when pollutants react in sunlight.
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DECEMBER 6, 2015
In 2013, 87% of the world’s population lived in areas exceeding the World Health Organization (WHO) Air Quality Guideline of 10 μg/m 3 PM 2.5 annual average), according to a major international study published in the ACS journal Environmental Science & Technology. and ozone (O 3 ). . … and ozone (O 3 ).
Green Car Congress
MARCH 25, 2014
Later this year, WHO will release indoor air quality guidelines on household fuel combustion, as well as country data on outdoor and indoor air pollution exposures and related mortality, plus an update of air quality measurements in 1,600 cities from all regions of the world. WHO PM Guideline Values. Earlier post.) g/m 3 annual mean.
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MARCH 12, 2019
As a result of these findings, the researchers say that national governments and international agencies must take urgent action to reduce air pollution, including re-evaluating legislation on air quality and lowering the EU’s current limits on the annual average levels of air pollution to match the WHO guidelines. g/m 3 —2.5
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