Air Quality Management: Philosophies, Legislation, and Glocal Strategies

Air Pollution Control Philosophies and Comparison

• Conceptual Framework

  • The primary goal is theoretically a completely unpolluted environment at zero cost to everyone.

  • Practical logic involves achieving an appropriately clean environment where the cost of control is distributed fairly among industry, vehicle owners, and other pollutant sources.

• The Four Main Philosophies

  • Emission Standards: Setting limits on the amount of pollutants released at the source.

  • Air Quality Standards: Establishing maximum allowable concentrations of pollutants in the ambient air.

  • Emission Taxes: Implementing financial penalties based on the quantity of pollutants emitted.

  • Cost-Benefit Standards: Determining pollution levels by weighing the economic costs of control against the environmental and health benefits.

• Comparative Assessment of Philosophies

  • Cost Effectiveness:

    • Emission Standards: Very bad.

    • Air Quality Standards: Good.

    • Emission Taxes: Fair.

    • Cost-Benefit Analysis: Excellent.

  • Simplicity:

    • Emission Standards: Excellent.

    • Air Quality Standards: Poor.

    • Emission Taxes: Excellent.

    • Cost-Benefit Analysis: Terrible.

  • Enforceability:

    • Emission Standards: Excellent.

    • Air Quality Standards: Fair.

    • Emission Taxes: Excellent.

    • Cost-Benefit Analysis: Unknown.

  • Flexibility:

    • Emission Standards: Poor.

    • Air Quality Standards: Fair.

    • Emission Taxes: Unnecessary.

    • Cost-Benefit Analysis: Unknown.

  • Evolutionary Ability:

    • Emission Standards: Fair.

    • Air Quality Standards: Fair.

    • Emission Taxes: Good.

    • Cost-Benefit Analysis: Good.

Strategic Air Quality Management (AQM)

• Core Components

  • The background of AQM involves strategic planning, which is multi-disciplinary.

  • Key terminologies include LAQM (Local Air Quality Management), AQMA (Air Quality Management Area), LEZ (Low Emission Zone), and AQAP (Air Quality Action Plan).

  • Information systems rely on both monitoring networks and dispersion modeling to identify spatial exceedance hotspots.

• Relevance and Drivers

  • A steep rise in anthropogenic combustion-related activities stems from over $50\%$ of the world’s urban population.

  • Air pollution is responsible for millions of premature deaths globally each year.

  • High health costs are associated with air quality severance.

  • Transboundary influences are significant; for example, air pollution from Asia affects global air circulation, cloud formation, and weather patterns.

• Air Quality Index (AQI)

  • The AQI includes four bands for the following pollutants: $PM_{10}$, $O_3$, $CO$, $SO_2$, and $NO_2$.

  • An AQI value of less than $50$ is considered a safe zone for everyone, including sensitive individuals.

  • In extreme cases, such as in Beijing, AQI values have soared to $755$.

Local Air Quality Management (LAQM) and AQMAs

• Legislation and Policy

  • Enforced by the UK Environment Act $1995$, which requires local authorities (LAs) to identify hotspots of poor quality.

  • Follows a "human health effects-based approach" consistent with the National Air Quality Strategy ($2007$).

  • Ensures UK compliance with the European Ambient Air Quality Framework Directive.

  • Local air quality management: Policy guidance (PG09) provides an overview of processes, principles, strategy development, and AQAP frameworks.

• Air Quality Management Areas (AQMAs)

  • Step 1 (Technical): LAs conduct a review and assessment of air quality and designate an AQMA if objectives are not met.

  • Step 2 (Management): LAs develop and implement an Air Quality Action Plan (AQAP) to meet quality objectives.

  • Current Status: More than $230$ LAs (approximately $60\%$) have declared one or more AQMAs for different pollutants.

  • Pollutants involved are predominantly $NO_2$ and $PM_{10}$.

  • Transportation is the primary source of pollution in approximately $92\%$ of all AQMAs.

Low Emission Zones (LEZ) and Ultra Low Emission Zones (ULEZ)

• Definitions

  • Low Emission Zone (LEZ): A defined area where access by polluting vehicles is restricted or deterred to improve air quality. Favored vehicles include bicycles, micromobility, alternative fuel vehicles, hybrids, and zero-emission vehicles (ZEVs).

  • Zero-Emission Zone (ZEZ): An LEZ where only ZEVs (battery electric and hydrogen) are permitted. All internal combustion engine vehicles, including plug-in hybrids that cannot run zero-emission, are banned. Walking, cycling, and fully electric public transport are allowed.

• Operational Mechanics

  • Vehicles not meeting standards are not physically barred by barriers but are fined upon entry unless a daily charge is paid.

  • In London, Automatic Number-Plate Recognition (ANPR) cameras read plates to check compliance against a database for emission standards, exemptions, or daily charge payments.

• Impact and Socio-Economic Challenges

  • The intent is to reduce diesel particulates ($PM_{10}$) and improve public health.

  • Impacts: Users may replace vehicles or change routes. However, workers carrying heavy cargo may struggle to afford cleaner, unsubsidized vehicles.

  • European Federation for Transport and Environment suggests LEZs should gradually transition into zero-emission mobility zones.

• The Ultra Low Emission Zone (ULEZ) Case Study

  • Operates $24$ hours a day, $7$ days a week (except Christmas Day) in London.

  • Charge: £$12.50$ for most vehicles (cars, motorcycles, vans up to $3.5$ tonnes); £$100$ for heavier vehicles (lorries over $3.5$ tonnes and buses/coaches over $5$ tonnes).

  • Expansion: On $25$ October $2021$, the zone expanded to the North Circular Road ($A406$) and South Circular Road ($A205$).

• ULEZ Controversies

  • Cost burden on lower-income households and small businesses.

  • Equity concerns for outer suburb commuters with fewer transit options.

  • Debates over the actual air quality and health gains versus the implementation cost.

  • Political backlash and protests, with some viewing the charges as a cash-raising tool rather than a health measure.

Air Quality Legislation and Regulated Pollutants

• UK Air Quality Standards Regulations 2010

  • Sets limit values, target values, and long-term objectives based on EU limit values.

  • Regulated Pollutants:

    1. Sulphur dioxide ($SO_2$)

    2. Nitrogen dioxide ($NO_2$)

    3. Oxides of nitrogen ($NO_x$)

    4. Particulate matter ($PM_{10}$ and $PM_{2.5}$)

    5. Lead

    6. Benzene

    7. Carbon monoxide ($CO$)

    8. Benzo(a)pyrene

    9. Ozone ($O_3$)

Information Systems and Decision Support Tools

• Meso-scale Models (Emission toolkits, dispersion, and GIS mapping)

  • OpenAir: Available via the OpenAir project.

  • ADMS-Urban: Cambridge Environmental Research Centre (CERC, UK).

  • AIRVIRO: Developed by SMHI, Sweden.

• Macro-scale Models (Regional forecasting)

  • Community Multi-scale Air Quality Model (CMAQ): Used by the USEPA.

  • WRF-Chem: Developed by NCAR and NOAA.

• Integrated Models

  • HEAT+ (Harmonized Emissions Analysis Tool): Focuses on CAPs, VOCs, and GHGs, used by Local Governments for Sustainability (ICLEI).

Global to Local (Glocal) and Transboundary Management

• Glocalization Theory

  • Combines global and local perspectives, acknowledging pollution as a multi-level problem.

  • Introduced to social-scientific vocabulary by Roland Robertson; later expanded by George Ritzer.

  • Key Aspects:

    • Integration of local policies with global environmental strategies.

    • Collaborative stakeholder involvement.

    • Adaptive management to respond to changing conditions and scientific knowledge.

• Examples of Glocal Action

  • ICLEI: Over $1,000$ metropolises/cities promoting sustainability through local action.

  • Regional Influences: $30-40\%$ of London's air pollution is generated from sources outside Greater London (GLA, $2014$).

• Transboundary Management

  • Nations with common issues group together (e.g., UNEP Indian Ocean Experiment - INDOEX).

  • Asian Brown Cloud (ABC): A layer of soot, dust, and smoke from biomass and fossil fuel burning covering South Asia, India, and Pakistan.

  • Current Trends: Background $O_3$ has increased up to $15\%$ in Europe despite a $30\%$ decline in peak ground-level concentrations. Emissions from China and India have been shown to enhance urban air quality issues in the US (Zhang et al., $2010$).

Co-management of Air Quality and Climate Change

• Strategic Alignment

  • Targets overlapping needs to ameliorate both local air pollution and global climate change.

  • Evaluates the air quality ramifications of climate mitigation decisions and vice-versa.

  • Benefits:

    • Cost-effective co-benefits for pollutants and Greenhouse Gas (GHG) emissions.

    • Addresses both emissions sources (transportation) and sinks (green infrastructure).

Case Studies in Local Management and Community Action

• Southampton Collective

  • A Community Interest Company (CIC) focused on "co-production, community, and culture."

  • Projects include the Southampton Climate Action Network and "Beat the Heat" (heatwave response).

• CLAiR-City

  • The largest citizen-led air quality project in Europe.

  • Shifts from top-down to bottom-up decision-making by asking what citizens want and what they will do to achieve it.

• Southampton City Council Green City Plan 2030

  • Targets:

    • $100\%$ of taxi and private hire fleet clean air zone compliant by $2023$.

    • $100\%$ of bus routes serviced by clean air zone compliant vehicles by $2020$.

    • Zero-emission public transport system across the city by $2030$.

  • Methodology: Uses a "solutions hierarchy" (Prevent → Reduce → Mitigate).

Health Impact and Recent Socio-Environmental Trends

• Pollution and COVID-19

  • Research suggests high concentrations of fine particulate matter ($PM_{2.5}$) rose death rates in the US.

  • During lockdowns, air pollution in London fell to its lowest levels since recording began in $2000$, causing monitoring sensors to alert collectors of possible faults due to the dramatically low readings.

• Heatwaves

  • By $2050$, approximately half of the European population may be exposed to high or very high risk of heat stress during summer.

• Micro-mobility Trials

  • Southampton e-scooter trials (Voi Technology) provide environmentally friendly travel for essential journeys and NHS staff.

  • Regulations: Limited to $12.5\,mph$; riders must be $18+$; banned on pavements and footpaths.

  • Safety Incident: A $14$-year-old girl died in east London following a crash between an e-scooter and a van.

Public Preferences and Research Findings

• Brock, Williams, and Kemp (2023) Study

  • Published in the Journal of Cleaner Production, exploring carbon reduction preferences using the PAPRIKA method.

  • Key Findings:

    • The public is unwilling to make large-scale lifestyle changes even for significant emission reductions.

    • Clear preference for "easy, convenient changes" rather than difficult changes in diet and transportation.

    • Value-Action Gap: High awareness of climate change does not translate into a willingness to make deep personal emission cuts.

    • Participants view reduction as a "group effort" and rarely see themselves as individual drivers.

Critical Health Cases and Inquests

• Ella Adoo-Kissi-Debrah Inquest ($2020$)

  • A nine-year-old girl who lived $25\,metres$ from the South Circular Road in Lewisham, London.

  • Became the first person in the UK to have air pollution listed as a cause of death after an asthma attack in $2013$. Air pollution "made a material contribution" to her death.

• Awaab Ishak ($2022$)

  • A toddler died from a respiratory condition caused by exposure to mould in his home in Rochdale.

  • The coroner ruled that mould is a key element of indoor air pollution and a major cause of illness and death.

• Cardiff Council Clean Air Initiative

  • Public Health Wales estimates over $220$ deaths each year among people aged $30+$ in Cardiff and the Vale can be attributed to $NO_2$ pollution.

  • The council is considering a congestion charge to address pollution levels.

  • Wales implemented a default $20\,mph$ speed limit law as of April $2024$ for built-up areas.

Questions & Discussion

• Key Practical and Ethical Questions:

  • Is it acceptable to travel for study, work, or holiday by ship or plane?

  • Is it acceptable to commute to work or study by car?

  • Should we only use locally sourced and in-season food to avoid transport emissions?

  • Should politicians always be evidence-based in their decision-making?

  • If the public democratically votes for parties that take no action on air pollution, is this ethically acceptable?

  • How do we maintain jobs and economic growth while improving air quality?

  • How much money would an individual pay per week to enjoy fresh, clean air?

Conclusions

• Air quality in the UK and EU remains a significant public health risk.

• Management efforts often lack sufficient resources, political support, and public engagement.

• Air pollution is a societal choice made through collective and individual behaviors.

• Vulnerable populations who cannot exercise choice are disproportionately impacted by imposed pollution concentrations.

• Dramatic improvements are possible through concerted, collective, and sustained action.

• Society must determine if it truly wants to change, potentially using the catalysts of the COVID-19 pandemic, the $2022$ Russia-Ukraine oil crisis, and the emergence of driverless cars and e-scooters.

• Non-exhaust emissions may be currently under-estimated in impact.