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WHO issues new, lower Global Air Quality Guidelines for classical pollutants

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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. Since WHO’s last 2005 global update, there has been a marked increase of evidence that shows how air pollution affects different aspects of health. WHO global air quality guidelines.

Pollution 435
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Study: ozone levels higher across China than in other countries tracking the air pollutant

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In China, people breathe ozone-laden air two to six times more often than people in the United States, Europe, Japan, or South Korea, according to a new international study published in Environmental Science & Technology Letters. 2017 for one ozone metric. For China, sites in 74 major cities with continuous observations from 2013?2017

Ozone 199
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Study: 87% of world’s population in 2013 lived in areas exceeding WHO PM2.5 guidelines

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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 Between 1990 and 2013, global population-weighted PM 2.5 Additionally, the study found that the population-weighted mean concentrations of ozone increased globally by 8.9%

2013 150
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California introduces first-in-nation rules to reduce climate “super pollutants” from commercial refrigeration, air conditioning equipment

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HFCs are synthetic gases that are used in a variety of applications, but mainly to replace ozone-depleting substances in aerosols, foams, refrigeration and air-conditioning. California is required to reduce HFC emissions 40% below 2013 levels by 2030 under Senate Bill 1383.

Pollution 281
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EPA, NHTSA issue One National Program Rule; EPA withdraws CA waiver for GHG and fuel economy

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For its part, EPA is withdrawing the Clean Air Act preemption waiver it granted to the State of California in January 2013 as it relates to California’s GHG and ZEV programs. The California waiver authority exists because California has uniquely difficult problems with ozone-forming pollutants.

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California 2017 GHG inventory shows 1.2% total drop from 2016; transportation sector emissions up 1%

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Emissions from transportation sources were relatively constant from 2002 through 2007, declined through 2013, then increased by 9.0 MMTCO 2 e (6%) from 2013 to 2017. It does not include emissions from petroleum refineries and oil production. Source: ARB. The unit is in terawatt-hour (1 TWh = 10 9 kWh).

2017 230
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Latest GHG Inventory shows California remains below 2020 emissions target; much steeper rate of GHG reductions required

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million metric tons between 2017 and 2018, the first such decline since 2013. in 2018 (2000-2018 average year-over-year increase is 6.8%), continuing the increasing trend as they replace Ozone Depleting Substances (ODS) being phased out under the 1987 Montreal Protocol. Transportation emissions declined 1.5 tons per person to 10.7

2020 221