92% of Asia and the Pacific’s population – about 4 billion people – are exposed to levels of air pollution that pose a significant risk to their health.

Air pollution in the Asia Pacific region is not only a major health risk, it also has damaging impacts on the environment and agricultural crop yields. These impacts have significant economic consequences, affecting economic growth as well as welfare.

While existing laws and policies have made progress in reducing air pollution in the region, further action is needed to bring air quality to safe levels.

A new report, Air Pollution in Asia and the Pacific: Science-based solutions, presents the first-ever scientific assessment of air pollution across 23 countries in the region. Using world-leading scientific models, the report outlines 25 policy actions that could achieve safe air quality levels for 1 billion people by 2030 – with numerous benefits for public health, economic development and the climate.

   

Findings: Air pollution sources and impacts

Some of the highest recorded levels of air pollution are in Asia Pacific countries

2.3 billion people in the region are exposed to levels of air pollution several times the WHO guideline for safe air.
 


The most damaging air pollutants are fine Particulate Matter (PM2.5) and Ground-level Ozone

While the sources of these pollutants vary by country, they are linked to only a handful of activities. Urban and heavily industrialized areas with high population densities have the highest levels of air pollution.
  


In 2015, the majority of global deaths from ambient (outdoor) air pollution - 35% - occurred in East Asia and the Pacific. About 33% occured in South Asia.

In addition to its impacts on human health and well-being, air pollution also threatens agricultural productivity and food security in the region, which is home to approximately 60% of the global total of undernourished people.

Opportunities and benefits

Existing policies can reduce pollution - but are not enough to reach safe levels

Without existing policies, population-weighted exposure to harmful particulate matter would grow by more than 50% by 2030 based on projected economic growth of 80% over the same period.


Continued economic growth and urbanisation will worsen air pollution unless governments take further action

If current policies aimed at limiting emissions are effectively enforced, air pollution in 2030 will remain at 2015 levels, leaving over 4 billion people exposed to health-damaging levels of air pollution.


Existing technology and policy solutions can bring clean air to 22% of the Asia Pacific population by 2030

An additional 650,000 people in the region could enjoy clean air by 2030 if a package of 25 Clean Air Measures is implemented starting today.

25 Clean Air Measures

Air Pollution in Asia and the Pacific: Science-based Solutions uses the highest quality data available and state-of-the-art modelling to identify the most effective 25 measures to reduce air pollution.

The analysis takes the region’s considerable diversity into account and groups the selected measures into three categories:

  • Conventional emission controls focusing on emissions that lead to the formation of fine particulate matter (PM2.5).
  • Further (next-stage) air-quality measures for reducing emissions that lead to the formation of PM2.5 and are not yet major components of clean air policies in many parts of the region. 
  • Measures contributing to development priority goals with benefits for air quality.

These measures cover the following sectors:

INDUSTRY
  • Post-combustion controls: Introduce state-of-the-art end-of-pipe measures to reduce sulphur dioxide, nitrogen oxides and particulate emissions at power stations and in large-scale industry

  • Industrial process emissions standards: Introduce advanced emission standards in industries, e.g., iron and steel plants, cement factories, glass production, chemical industry, etc.

  • Brick kilns: Improve efficiency and introduce emissions standards

  • Energy efficiency standards for industry: Introduce ambitious energy efficiency standards for industry

TRANSPORT
  • Electric vehicles: Promote the use of electric vehicles
  • Improved public transport: Encourage a shift from private passenger vehicles to public transport

  • International shipping: Require low-sulphur fuels and control of particulate emissions
  • Emissions standards for road vehicles: Strengthen all emission standards; special focus on regulation of diesel light- and heavy-duty vehicles

  • Vehicle inspection and maintenance: Enforce mandatory checks and repairs for vehicles

  • Dust control: Suppress construction and road dust; increase green areas

AGRICULTURE
  • Agriculture crop residues: Manage agricultural residues, including strict enforcement of bans on open burning
  • Livestock manure management: Introduce covered storage and efficient application of manures; encourage anaerobic digestion

  • Nitrogen fertilizer application: Establish efficient application; for urea also use urease inhibitors and/or substitute with, for example, ammonium nitrate

  • Rice paddies: Encourage intermittent aeration of continuously flooded paddies

POWER GENERATION
  • Renewables for power generation: Use incentives to foster extended use of wind, solar and hydro power for electricity generation and phase out the least efficient plants
RESIDENTIAL COOKING, HEATING AND LIGHTING
  • Clean cooking and heating: Use clean fuels - electricity, natural gas, liquefied petroleum gas (LPG) in cities, and LPG and advanced biomass cooking and heating stoves in rural areas; substituion of coal by briquettes
  • Energy efficiency for households: Use incentives to improve the energy efficiency of household appliances, buildings, lighting, heating and cooking; encourage rooftop solar installations

FOREST AND PEATLAND FIRES
  • Prevention of forest and peatland fires: Improve forest, land and water management and fire prevention strategies
WASTE
  • Residential waste burning: Strictly enforce bans on open burning of household waste
  • Solid waste management: Encourage centralized waste collection with source separation and treatment, including gas utilisation

  • Wastewater treatment: Introduce well-managed two-stage treatment with biogas recovery

SOLVENTS, OIL AND GAS
  • Oil and gas production: Encourage recovery of associated petroleum gas; stop routine flaring; improve leakage control
  • Solvent use and refineries: Introduce low-solvent paints for industrial and do-it-yourself applications; leak detection; inceneration and recovery
  • Coal mining: Encourage pre-mining recovery of coal mine gas
COOLING AGENTS
  • Hydrofluorocarbon (HFC) refrigerant replacement: Ensure full compliance with the Kigali Amendment to the Montreal Protocol

Benefits of action

Implementing the 25 measures in this report would have numerous benefits beyond improved air quality.

CLIMATE

Carbon dioxide emissions in 2030 could be reduced by almost 20% and methane by 45%.

This would decrease the expected warming by a third of a degree Celsius by 2050 and would be a significant contribution to the Paris Agreement target of keeping global temperature rise this century well below 2ºC.

FOOD SECURITY

Ozone-induced crop losses could be reduced considerably – by 45% for maize, rice, soy and wheat combined. The health of natural ecosystems would also improve.

Reduced nitrogen and sulphur deposition to ecosystems would have benefits for water and soil quality, as well as biodiversity.

HEALTH

One billion people could breathe clean air that meets stringent World Health Organization (WHO) standards by 2030.

The number of people exposed to pollution above the highest WHO Interim Target could fall by 80% to 430 million. Furthermore, premature mortality from outdoor air pollution could decline by about a third, and an additional 2 million premature deaths a year from indoor air pollution could be avoided.

SUSTAINABLE DEVELOPMENT GOALS (SDGs)

Improving air quality and mitigating climate change would directly contribute to the realization of:

  • SDG 3: Good Health and Well-being
  • SDG 11: Sustainable Cities and Communities
  • SDG 12: Responsible Consumption and Production
  • SDG 13: Climate Action

WATER SECURITY

A reduction in particulate emissions would slow the melting of glaciers and snowfields, reduce the risk of disasters related to glacier lake outburst floods, and help mitigate water insecurity for billions of people.

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Video: 25 Clean Air Measures for Asia and the Pacific

Video: 25 Clean Air Measures for Asia and the Pacific
Video: 25 Clean Air Measures for Asia and the Pacific
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