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Air Pollution, Climate and Health
the
calculation
is simple
An estimated 7 million people per year die from air
pollution-related diseases. These include stroke
and heart disease, respiratory illness and cancers.
+
Many health-harmful air pollutants also damage
the climate. Fine particles of black carbon (soot)
from diesel and biomass combustion and ground
level ozone are leading examples.
=
Reducing air pollution would save lives and help
slow the pace of near-term climate change.
AIR POLLUTION ‒ THE HEALTH STORY
Air pollution is responsible for an estimated 7
million deaths annually, or one in eight
premature deaths every year. This makes it the
world’s largest environmental health risk, and
among the largest global health risks –
comparable with “traditional” health risks such as
smoking, high cholesterol, high blood sugar and
obesity.
Some 4.3 million air pollution-related deaths are
due to household air pollution and 3.7 million
deaths are due to outdoor air pollution. Most air
pollution-related deaths are from heart disease
and stroke, followed by chronic obstructive
pulmonary disease, acute and chronic respiratory
conditions and cancers.
The air pollutant linked most closely to excess
death and disease is PM2.5 (particulate matter less
than 2.5 micrometres in diameter), heavily emitted
by both diesel vehicles and the combustion of
biomass, coal and kerosene. Ozone is another
pollutant that causes significant respiratory illness,
including chronic asthma. There is growing evidence that oxides of nitrogen (NOx), a
major contributor to ozone and heavily emitted by diesel vehicles, is also linked to
significant health risks.
THE AIR POLLUTION & CLIMATE NEXUS
Black Carbon is a “short-lived climate pollutant” (SLCP) that is a major component of
health-harmful PM2.5 air pollution – particularly from diesel vehicles, diesel engines, coal
and biomass stoves and waste incineration. Since black carbon persists for only a short
time in the atmosphere, reducing black carbon emissions can have significant near-term
climate and health benefits.
Ground-level Ozone is also an SLCP, formed
by a mix of air pollutants typically emitted over
cities or nearby rural areas, including methane
(another SLCP) from urban sewage, waste, and
agriculture, as well as NOx from vehicles.
Along with being a key factor in respiratory
illness, ozone decreases crop yields and
contributes to climate change.
!2
Deaths attributable to the
joint effects of household air
pollution and ambient air
pollution by disease, 2012
(C. Dora, WHO)
6%
8%
17%
33%
36%
Ischaemic heart disease
Stroke
Chornic obstructive pulmonary disease
Acute lower respiratory disease
Lung Cancer
2 529 700
2 296 900
1 187 900
597 000
443 100
The link between air pollution and climate change
Air pollution (PM):
PM/BC, O3, NOx
Climate change (SLCPs):
BC, methane, O3
Climate change
(CO2)
Transport,energy,landuse
policies/Combustion
Local/ short
term health
impacts
Global/long
term health
impacts
ACT NOW ‒ IMMEDIATE BENEFITS
By acting now to reduce short-lived climate pollutants that are also air pollutants
we will see substantial and immediate gains in public health, saving millions of lives, as
well as slowing near-term climate change. The United Nations Environment Programme
(UNEP) and the World Meteorological Organization (WMO) have estimated that
reducing SLCP emissions from key sources such as traffic, cookstoves, waste, agriculture
and industry could reduce global warming by about 0.5° C (2010-2050).
Public health benefits are enjoyed
locally – The largest initial benefits of
reductions in short-lived climate and air
pollution emissions will be enjoyed by
people living in the areas where actions
are taken – making measures very
attractive to policymakers. Public health
benefits of reduced ozone and black
carbon emissions may begin to be
realized within in a matter of days or
weeks through improved air quality.
EVERYONE WINS ‒ GAINS ARE LARGEST FOR THE WORLD S MOST VULNERABLE
Air and climate pollutants have their greatest health impacts among the poor – but
the poor are not the only victims of air pollution. Reducing household pollution risks
from smoky biomass and coal cookstoves, in particular, can help alleviate the burden of
poverty-related diseases. Urban air pollution levels also tend to be higher in many low-
and middle-income cities and in poor neighbourhoods of high-income cities. This
means reductions in SLCPs can
have particularly large health
benefits for lower income
groups as well as for children,
elderly, and women.
It is important to remember,
however, that urban air
pollution disperses very widely.
Ozone pollution levels may
often be highest on the urban
periphery. So rich and poor
alike benefit when SLCP
emissions, and consequent air
pollution, are reduced.
!
!3
Health benefits from air pollution reductions
Injuries, physical activity,
noise, diet
Air pollution (PM)
Climate change (SLCPs)
Climate change (CO2)
Transport,energy,landusepolicies/Combustion
Local/ short
term health
impacts
Global/long
term health
impacts
Deaths per capita attributable to the joint effects of household air
pollution and ambient air pollution by region, 2012 (C. Dora, WHO)
Deathsper100,000capita
0
45
90
135
180
Africa
Am
erica
LM
IAm
erica
H
I
Em
rLM
I
Em
rH
I
EurLM
I
EurH
I
Sear
W
prLM
I
W
prH
I
W
orld
100
32
172
124
47
106
29
70
2522
76
Emr: Eastern Mediterranean, Sear: South-East Asia, Wpr: Western
Pacific; LMI: Low- and middle-income; HI: High-income
WHAT CAN WE DO?
The World Health Organization and the Climate and Clean Air Coalition to Reduce
Short-Lived Climate Pollutants, have joined together with a number of other leading
partners in a health initiative that aims to reduce air pollution-related deaths and
disease as well as emissions of short-lived climate pollutants.
Household/Indoor Air Pollution
New WHO Indoor Air Quality Guidelines: Household Fuel Combustion set emissions
thresholds, by which the cleanest cookstove and lighting technologies may be
identified. These guidelines also recommend a) phasing out household kerosene and
coal use altogether; b) scaling-up production and use of the cleanest household fuels,
including LPG, ethanol and biogas; and c) transitioning from inefficient biomass
cookstoves to improved models with adequate venting. The Global Alliance for Clean
Cookstoves, a leading CCAC member, is promoting initiatives to develop and distribute
improved cookstove technologies.
Ensuring that stoves are placed in well-ventilated
spaces and as part of an energy-efficient home
design is also critical. Finally, small solar systems
to power lights can be substitutes for kerosene
lamps – in homes as well as in health facilities –
also reducing risks of burns and injuries. Many of
these innovations also have clear economic
benefits in both health and climate terms –
repaying the investment many times over through
lower disease rates and health care costs. These
are highlighted in WHO’s Health in the Green
Economy series, and forthcoming WHO Housing
and Health guidelines.
Urban Air Pollution
Urgent action to tackle air pollution in cities is needed to improve the health and well-
being of over half of the world’s population. Only 12% of cities globally meet WHO air
quality guidelines, with some cities suffering from pollution levels 2-5 times higher than
guideline thresholds. The good news is that urban planning, urban transport, building
design and waste methane gas capture can reduce urban emissions from traffic,
building energy, power systems and municipal sewage/waste.
Strategic changes in urban development priorities may be the most effective means of
reducing reduce air and climate pollutants while optimizing health benefits. Cities are
suffering from soaring rates of noncommunicable diseases. This is due not only to air
pollution, but also to physical inactivity, poor diets, unsafe housing and other urban
health inequities. Urban policies that target climate and air pollution emissions, as well
!4
as other causes of ill health, can yield multiple benefits. For instance, investing in clean
urban transit, pedestrian and bike networks can help reduce traffic injury and support
physical activity – as well as reducing SCLPs, air pollution and CO2 emissions. More
physical activity, in turn, helps reduce obesity and obesity related-diseases.
A new “Urban Health Initiative” (UHI) of the CCAC/UNEP, led by WHO, World Bank, the
USA and Norway, aims to realize health benefits by tackling urban short-lived climate
pollutants. Other leaders of the initiative include the World Meteorological
Organization, UN Habitat, Clean Air
Asia, ICLEI global cities network, and
the Integrated Center for Mountain
Development (ICIMOD).
The UHI will step up collaborations with
the health sector, which can evaluate
urban policy options and priorities in
light of local health needs, inform
patient populations about air pollution’s
health risks as well as actions that
reduce their exposures. The UHI will
also collaborate with CCAC initiatives
on diesel vehicle emissions, household
cooking/heating, and municipal waste
management, among others.
!
!
!
!
!
!
!
!
!
!5
OTHER RESOURCES
WHO
WHO Air Pollution and Health - http://www.who.int/phe/health_topics/outdoorair/en/	

WHO Household (Indoor) Air Pollution - http://www.who.int/indoorair/en/	

WHO Indoor Air Quality Guidelines: household fuel combustion - http://www.who.int/
indoorair/guidelines/hhfc/en/	

WHO Ambient (Outdoor) Air Pollution data 2014 - http://www.who.int/phe/
health_topics/outdoorair/databases/cities/en/	

WHO Health in the Green Economy series: http://www.who.int/hia/green_economy/en/	

CCAC
Breathe Life Health Campaign - http://www.unep.org/ccac/Initiatives/CCACHealth/
tabid/133348/Default.aspx	

Urban Health Initiative - http://www.unep.org/ccac/Initiatives/UrbanHealth/tabid/
794596/Default.aspx	

CCAC initiatives on household cooking/heating; diesel vehicles, municipal solid waste,
industrial and agricultural SLCP emissions - http://www.unep.org/ccac/Initiatives/tabid/
130287/Default.aspx	

UNEP/WMO Integrated Assessment of Black Carbon and Tropospheric Ozone Report
(2011) - http://www.wmo.int/pages/prog/arep/gaw/documents/BlackCarbon_SDM.pdf
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!6

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Air pollution climate_health_factsheet

  • 1. ! ! ! ! ! Air Pollution, Climate and Health the calculation is simple An estimated 7 million people per year die from air pollution-related diseases. These include stroke and heart disease, respiratory illness and cancers. + Many health-harmful air pollutants also damage the climate. Fine particles of black carbon (soot) from diesel and biomass combustion and ground level ozone are leading examples. = Reducing air pollution would save lives and help slow the pace of near-term climate change.
  • 2. AIR POLLUTION ‒ THE HEALTH STORY Air pollution is responsible for an estimated 7 million deaths annually, or one in eight premature deaths every year. This makes it the world’s largest environmental health risk, and among the largest global health risks – comparable with “traditional” health risks such as smoking, high cholesterol, high blood sugar and obesity. Some 4.3 million air pollution-related deaths are due to household air pollution and 3.7 million deaths are due to outdoor air pollution. Most air pollution-related deaths are from heart disease and stroke, followed by chronic obstructive pulmonary disease, acute and chronic respiratory conditions and cancers. The air pollutant linked most closely to excess death and disease is PM2.5 (particulate matter less than 2.5 micrometres in diameter), heavily emitted by both diesel vehicles and the combustion of biomass, coal and kerosene. Ozone is another pollutant that causes significant respiratory illness, including chronic asthma. There is growing evidence that oxides of nitrogen (NOx), a major contributor to ozone and heavily emitted by diesel vehicles, is also linked to significant health risks. THE AIR POLLUTION & CLIMATE NEXUS Black Carbon is a “short-lived climate pollutant” (SLCP) that is a major component of health-harmful PM2.5 air pollution – particularly from diesel vehicles, diesel engines, coal and biomass stoves and waste incineration. Since black carbon persists for only a short time in the atmosphere, reducing black carbon emissions can have significant near-term climate and health benefits. Ground-level Ozone is also an SLCP, formed by a mix of air pollutants typically emitted over cities or nearby rural areas, including methane (another SLCP) from urban sewage, waste, and agriculture, as well as NOx from vehicles. Along with being a key factor in respiratory illness, ozone decreases crop yields and contributes to climate change. !2 Deaths attributable to the joint effects of household air pollution and ambient air pollution by disease, 2012 (C. Dora, WHO) 6% 8% 17% 33% 36% Ischaemic heart disease Stroke Chornic obstructive pulmonary disease Acute lower respiratory disease Lung Cancer 2 529 700 2 296 900 1 187 900 597 000 443 100 The link between air pollution and climate change Air pollution (PM): PM/BC, O3, NOx Climate change (SLCPs): BC, methane, O3 Climate change (CO2) Transport,energy,landuse policies/Combustion Local/ short term health impacts Global/long term health impacts
  • 3. ACT NOW ‒ IMMEDIATE BENEFITS By acting now to reduce short-lived climate pollutants that are also air pollutants we will see substantial and immediate gains in public health, saving millions of lives, as well as slowing near-term climate change. The United Nations Environment Programme (UNEP) and the World Meteorological Organization (WMO) have estimated that reducing SLCP emissions from key sources such as traffic, cookstoves, waste, agriculture and industry could reduce global warming by about 0.5° C (2010-2050). Public health benefits are enjoyed locally – The largest initial benefits of reductions in short-lived climate and air pollution emissions will be enjoyed by people living in the areas where actions are taken – making measures very attractive to policymakers. Public health benefits of reduced ozone and black carbon emissions may begin to be realized within in a matter of days or weeks through improved air quality. EVERYONE WINS ‒ GAINS ARE LARGEST FOR THE WORLD S MOST VULNERABLE Air and climate pollutants have their greatest health impacts among the poor – but the poor are not the only victims of air pollution. Reducing household pollution risks from smoky biomass and coal cookstoves, in particular, can help alleviate the burden of poverty-related diseases. Urban air pollution levels also tend to be higher in many low- and middle-income cities and in poor neighbourhoods of high-income cities. This means reductions in SLCPs can have particularly large health benefits for lower income groups as well as for children, elderly, and women. It is important to remember, however, that urban air pollution disperses very widely. Ozone pollution levels may often be highest on the urban periphery. So rich and poor alike benefit when SLCP emissions, and consequent air pollution, are reduced. ! !3 Health benefits from air pollution reductions Injuries, physical activity, noise, diet Air pollution (PM) Climate change (SLCPs) Climate change (CO2) Transport,energy,landusepolicies/Combustion Local/ short term health impacts Global/long term health impacts Deaths per capita attributable to the joint effects of household air pollution and ambient air pollution by region, 2012 (C. Dora, WHO) Deathsper100,000capita 0 45 90 135 180 Africa Am erica LM IAm erica H I Em rLM I Em rH I EurLM I EurH I Sear W prLM I W prH I W orld 100 32 172 124 47 106 29 70 2522 76 Emr: Eastern Mediterranean, Sear: South-East Asia, Wpr: Western Pacific; LMI: Low- and middle-income; HI: High-income
  • 4. WHAT CAN WE DO? The World Health Organization and the Climate and Clean Air Coalition to Reduce Short-Lived Climate Pollutants, have joined together with a number of other leading partners in a health initiative that aims to reduce air pollution-related deaths and disease as well as emissions of short-lived climate pollutants. Household/Indoor Air Pollution New WHO Indoor Air Quality Guidelines: Household Fuel Combustion set emissions thresholds, by which the cleanest cookstove and lighting technologies may be identified. These guidelines also recommend a) phasing out household kerosene and coal use altogether; b) scaling-up production and use of the cleanest household fuels, including LPG, ethanol and biogas; and c) transitioning from inefficient biomass cookstoves to improved models with adequate venting. The Global Alliance for Clean Cookstoves, a leading CCAC member, is promoting initiatives to develop and distribute improved cookstove technologies. Ensuring that stoves are placed in well-ventilated spaces and as part of an energy-efficient home design is also critical. Finally, small solar systems to power lights can be substitutes for kerosene lamps – in homes as well as in health facilities – also reducing risks of burns and injuries. Many of these innovations also have clear economic benefits in both health and climate terms – repaying the investment many times over through lower disease rates and health care costs. These are highlighted in WHO’s Health in the Green Economy series, and forthcoming WHO Housing and Health guidelines. Urban Air Pollution Urgent action to tackle air pollution in cities is needed to improve the health and well- being of over half of the world’s population. Only 12% of cities globally meet WHO air quality guidelines, with some cities suffering from pollution levels 2-5 times higher than guideline thresholds. The good news is that urban planning, urban transport, building design and waste methane gas capture can reduce urban emissions from traffic, building energy, power systems and municipal sewage/waste. Strategic changes in urban development priorities may be the most effective means of reducing reduce air and climate pollutants while optimizing health benefits. Cities are suffering from soaring rates of noncommunicable diseases. This is due not only to air pollution, but also to physical inactivity, poor diets, unsafe housing and other urban health inequities. Urban policies that target climate and air pollution emissions, as well !4
  • 5. as other causes of ill health, can yield multiple benefits. For instance, investing in clean urban transit, pedestrian and bike networks can help reduce traffic injury and support physical activity – as well as reducing SCLPs, air pollution and CO2 emissions. More physical activity, in turn, helps reduce obesity and obesity related-diseases. A new “Urban Health Initiative” (UHI) of the CCAC/UNEP, led by WHO, World Bank, the USA and Norway, aims to realize health benefits by tackling urban short-lived climate pollutants. Other leaders of the initiative include the World Meteorological Organization, UN Habitat, Clean Air Asia, ICLEI global cities network, and the Integrated Center for Mountain Development (ICIMOD). The UHI will step up collaborations with the health sector, which can evaluate urban policy options and priorities in light of local health needs, inform patient populations about air pollution’s health risks as well as actions that reduce their exposures. The UHI will also collaborate with CCAC initiatives on diesel vehicle emissions, household cooking/heating, and municipal waste management, among others. ! ! ! ! ! ! ! ! ! !5
  • 6. OTHER RESOURCES WHO WHO Air Pollution and Health - http://www.who.int/phe/health_topics/outdoorair/en/ WHO Household (Indoor) Air Pollution - http://www.who.int/indoorair/en/ WHO Indoor Air Quality Guidelines: household fuel combustion - http://www.who.int/ indoorair/guidelines/hhfc/en/ WHO Ambient (Outdoor) Air Pollution data 2014 - http://www.who.int/phe/ health_topics/outdoorair/databases/cities/en/ WHO Health in the Green Economy series: http://www.who.int/hia/green_economy/en/ CCAC Breathe Life Health Campaign - http://www.unep.org/ccac/Initiatives/CCACHealth/ tabid/133348/Default.aspx Urban Health Initiative - http://www.unep.org/ccac/Initiatives/UrbanHealth/tabid/ 794596/Default.aspx CCAC initiatives on household cooking/heating; diesel vehicles, municipal solid waste, industrial and agricultural SLCP emissions - http://www.unep.org/ccac/Initiatives/tabid/ 130287/Default.aspx UNEP/WMO Integrated Assessment of Black Carbon and Tropospheric Ozone Report (2011) - http://www.wmo.int/pages/prog/arep/gaw/documents/BlackCarbon_SDM.pdf ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !6