Brian Barton
The Philippines is an archipelagic state in Southeast Asia, consisting of over 7,500 islands. The capital city of Manila, located in Luzon, is the most populous city in the country, with an estimated population of over 109 million people. Manila's rapid population growth has resulted in a high population density of approximately 12,600 people per square kilometre, contributing to the city's air pollution problem. The city's air quality index (AQI) often falls within the Moderate range, with the primary pollutant being fine particulate matter (PM2.5). Various factors, including vehicle emissions from the city's popular jeepney public transport system, have led to Manila's air pollution issues.
| Characteristics | Values |
|---|---|
| Most polluted city | Manila |
| Air Quality Index (AQI) in December 2020 | 91 US AQI ("Moderate") |
| Main pollutant | PM2.5 |
| PM2.5 concentration in December 2020 | 31.2 µg/m³ |
| Population of Manila | Over 109 million |
| Population density | 12,600 per square kilometre |
| Main sources of air pollution | Transportation, stationary sources, and area sources |
| Percentage of transportation emissions from Jeepneys | 15% |
| Percentage of air particulate matter from Jeepneys | 48% |
| Main sources of water pollution | Unregulated discharge of domestic and industrial wastewater, agricultural runoff |
| Plastic waste contribution | 0.75 million metric tons of plastic entering the ocean annually |
| Recent AQI level | 53 ("Moderate") |
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What You'll Learn
Manila's air pollution
The Philippines' capital, Manila, is one of the most polluted cities in the country. In 2019, it was the 5th most polluted city in the Philippines, with an average PM2.5 reading of 18.2 µg/m³. A more recent report from 2023 placed the Philippines as the 79th worst country in the world for air pollution, with an average PM2.5 concentration of 13.5 µg/m³.
The high levels of air pollution in Manila have had a direct impact on the health of its residents. Urine samples taken from children living on the streets of Manila showed very high levels of lead in their bloodstream, mainly due to their proximity to vehicle exhaust fumes. A paediatrician from Makati reported that 90% of his patients suffer from some form of respiratory illness, with some babies as young as two months old suffering from asthma. During periods of extremely high pollution, such as after New Year celebrations when fireworks are set off, residents are advised to stay indoors, and even healthy individuals may experience breathing difficulties and throat irritation with prolonged exposure to the polluted air.
To address the issue of air pollution in Manila, a combination of strategies is necessary. Policy measures such as stricter emissions standards and the promotion of cleaner technologies are crucial. The Philippine Clean Air Act of 1999 is a step forward, but it needs to be updated and improved to effectively tackle the current pollution levels. Technological innovations, like adopting electric vehicles and improving public transportation, can significantly reduce emissions. Additionally, public participation and education about the adverse effects of pollution can help foster a collective effort to create a healthier and more sustainable environment for future generations.
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Population growth and urbanisation
The Philippines is an archipelagic state in Southeast Asia, consisting of over 7,500 islands. The country's population was estimated to be over 109 million in 2020, with a significant majority living in urban centres. The capital city, Manila, located in Luzon, has experienced the fastest population growth rate in the country since 1970, with a current population of approximately 12 million people, and a density of 12,600 people per square kilometre. This rapid urbanisation has had a detrimental impact on the city's environment and air quality.
Manila is widely recognised as one of the most polluted cities in the Philippines, with air pollution posing a significant threat to public health and the environment. The city's air quality index (AQI) recorded levels of 91 US AQI in December 2020, which is classified as "Moderate" by the World Health Organisation (WHO). However, the concentration of fine particulate matter (PM2.5) in the city often exceeds the WHO's recommended safety guidelines, reaching levels as high as 31.2 µg/m³. This is largely due to the dense traffic and industrial activities in the city, with transportation being the leading contributor to air pollution in the Philippines.
The rapid population growth and urbanisation in Manila have exacerbated the problem of air pollution. As the population continues to expand, the demand for transportation increases, leading to a higher number of vehicles on the roads. Manila is notorious for its traffic jams, with 2.2 million motor vehicles contributing to the city's congestion. The majority of these vehicles are older models that have not been fitted with modern emission-reducing devices, resulting in higher emissions of harmful pollutants.
Additionally, the urban poor in Manila often live in close proximity to power stations or industrial plants, exposing them to high levels of air pollutants. The burning of fossil fuels, particularly diesel and gasoline, is a significant contributor to the city's poor air quality. The country's most recent national emissions inventory found that 56% of outdoor air pollution came from the transportation sector. Moreover, jeepneys, the Philippines' most popular means of public transport, account for 15% of transportation emissions and 48% of air particulate matter in Manila. The dense traffic and the high number of older vehicles on the road contribute to the high levels of nitrogen dioxide (NO2) and sulphur dioxide (SO2) in the city.
To address the issue of air pollution in Manila and the Philippines as a whole, a combination of strategies is required. Policy measures such as stricter emissions standards and the promotion of cleaner technologies are crucial. The Philippine Clean Air Act of 1999 is a positive step, but it needs to be updated and improved to effectively combat the current levels of air pollution. Technological innovations, such as adopting electric vehicles and improving public transportation infrastructure, can significantly reduce emissions and improve air quality in the long run. Community initiatives that encourage tree planting, waste management, and the use of renewable energy can also play a vital role in mitigating pollution and creating a more sustainable future for the country.
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Water pollution
The Pasig River, one of the Philippines' main rivers, is considered one of the most polluted rivers in the world. It has been the primary recipient of pollution from Metro Manila's inhabitants, with garbage and untreated sewage accumulating to the point that it can no longer support life beyond janitor fish and water lilies. The Marilao River, which flows into Manila Bay, is also listed among the world's ten most polluted rivers due to contamination from heavy metals and chemicals.
The country's rapid population growth, urbanization, agriculture, and industrialization have all contributed to the decline in water quality. Industrial processes, agricultural runoff, and inadequate domestic sewage treatment are the primary sources of water pollution. The lack of proper sewage treatment has severe health implications, with waterborne diseases like cholera, typhoid, dysentery, and hepatitis being common in areas with poor water quality.
The government has recognized the severity of the issue and has taken steps to address it. The Philippine Department of Environment and Natural Resources (DENR) has initiated programs like the Adopt-an-Estero/Waterbody Programme, which involves public-private partnerships to clean and rehabilitate water bodies. Additionally, the government is working on restoring Manila Bay and has plans to restore rivers across the country.
Community involvement and public awareness are also crucial in tackling water pollution. Education campaigns can inform citizens about the impacts of water pollution and encourage responsible behaviors, empowering local communities to actively protect their water resources.
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Solid waste management
The Philippines is among the top waste generators in Southeast Asia and is a significant contributor to plastic waste pollution in the seas. This is due to a variety of factors, including low recycling rates, issues with waste collection, and a lack of consistent plastic packaging segregation in many Local Government Units (LGUs). The country's insufficient capacity to recycle high-value and low-value plastics results in only a small portion being repurposed, while a large amount ends up in the ocean.
To address these issues, the Philippine government has implemented various policies and laws, including the Ecological Solid Waste Management Act (RA 9003), which encourages waste reduction, recovery, recycling, and reuse. LGUs are required to create 10-year solid waste management plans with targets and timetables, prioritizing reuse, recycling, and composting programs. However, the success of these plans depends on approval from the National Solid Waste Management Commission (NSWMC).
In addition to legislative efforts, social enterprises like Plastic Bank® aim to tackle ocean plastic pollution while improving the lives of collector communities. Through impact programs, they empower recycling communities and provide them with a path out of poverty.
Despite these efforts, solid waste management remains a challenge, especially in remote areas where access to waste collection services and infrastructure is limited. Waste-to-energy schemes have been proposed as a potential solution, but they face opposition due to concerns about toxic emissions and the large volume of feedstock required.
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Air pollution solutions
The Philippines has been facing air quality issues for decades, with Manila being the most polluted city in the country. The country's rapid industrialisation and urbanisation have exacerbated the problem, with transportation being the leading contributor to air pollution. Diesel-run jeepneys, the most popular means of public transport, emit dark-coloured fumes that contribute significantly to Manila's poor air quality.
To address air pollution in the Philippines, a combination of strategies is required, involving government, industry, and citizens. Here are some solutions to mitigate air pollution and improve air quality:
Policy Measures and Emissions Standards
The Philippine government has recognised the need to update emissions regulations and move away from fossil fuel energy sources. The Clean Air Act of 1999 is a step forward, but it needs improvement to meet the acceptable levels recommended by the World Health Organization (WHO). The government should develop stricter emissions standards and promote cleaner technologies. The Department of Trade and Industry (DTI), Local Government Units (LGUs), and the Department of Environment and Natural Resources (DENR) are working together to create an action plan to manage air pollution from motor vehicles. Additionally, the DENR, in collaboration with other organisations, has developed the National Strategy to Reduce Short-Lived Climate Pollutants, which includes biodegradable waste diversion, methane capture, and recycling initiatives.
Technological Innovations
Adopting electric vehicles and improving public transportation infrastructure can significantly reduce emissions. The Public Utility Vehicle Modernization Program (PUVMP) aims to replace old jeepneys with more environmentally friendly models, reducing greenhouse gas emissions. Cities like Cebu have implemented the Bus Rapid Transit (BRT) system to decrease the reliance on private vehicles.
Renewable Energy and Energy Efficiency
Renewable energy sources, such as solar, wind, and hydropower, can help reduce the country's reliance on fossil fuels. The Philippines has joined the Climate & Clean Air Coalition (CCAC) and is actively addressing air pollution challenges through various projects, such as the "Advancing the Clean Air, Health and Climate Integration Agenda in the ASEAN Region."
Waste Management and Pollution Prevention
Community initiatives that encourage tree planting, effective waste management, and recycling can help mitigate pollution. The Philippines aims to increase the proportion of biowaste that is composted and recycled, while also capturing methane from solid waste disposal sites. Additionally, the country is working to reduce air pollution from stationary sources, such as industrial activities, and area sources, like crop residue burning and fertiliser use in the agricultural sector.
Public Participation and Education
Involving the public through education and participation in air quality planning and monitoring is essential. Encouraging citizens to embrace renewable energy practices and promoting self-regulation through incentives can foster a collective effort to improve air quality. The Philippine government has recognised the importance of public participation and is working to implement a comprehensive management program for air pollution.
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Frequently asked questions
While sources don't agree on a single most polluted city in the Philippines, Manila is frequently mentioned as having high levels of air pollution. A 2020 survey placed the population density of Manila at roughly 12,600 per square kilometre, and the city has higher levels of nitrogen dioxide (NO2) and sulphur dioxide (SO2) than Cebu and Davao.
The main source of air pollution in the Philippines is transportation, with a significant number of vehicles running on diesel and gasoline. Jeepneys, the most popular form of public transport in the Philippines, are a major contributor to air pollution in Manila. Most jeepneys use diesel fuel, which can be a great source of pollution if not correctly maintained and serviced regularly.
Air pollution in the Philippines exposes residents to increasing rates of asthma, chronic bronchitis and other respiratory conditions due to prolonged exposure to polluted air. A paediatrician from a medical centre in Makati claimed that 90% of his patients suffer from some sort of respiratory illness. Urine samples taken from children living on Manila’s congested streets were found to have very high levels of lead in their bloodstream, mainly due to their close proximity to vehicle exhaust fumes.
The Philippines has implemented policies and laws to address pollution, including the Clean Air Act (RA 8749), Clean Water Act (RA 9275), and Ecological Solid Waste Management Act (RA 9003). Cities like Cebu have also started implementing policies like the Bus Rapid Transit (BRT) system to decrease reliance on private vehicles. However, the Philippine Clean Air Act of 1999 is largely outdated and needs improvement.
