Satellite remote sensing for air quality assessment provides information over a large spatial coverage and time period that shows the trends and effects of anthropogenic activities. Using data collected from the Moderate Resolution Imaging Spectroradiometer (MODIS) Terra satellite from the years 2010 to 2020, the spatiotemporal variations to aerosol optical depth (AOD) in Koronadal City and Quezon City were studied. Validation showed a strong relationship between the MODIS AOD values and the Aerosol Robotic Network (AERONET) AOD values (R² = 0.83) and a low root mean square error (RMSE) of 0.26. Annual variation in the AOD of the two study areas showed a peak AOD value in 2015 due to an immense biomass burning in Indonesia and a low AOD value in 2020 due to the COVID-19 lockdown. Koronadal City experienced a high AOD value during the fall season due to aerosols from biomass burning in Indonesia that were carried by the southwest monsoon. Quezon City experienced a high AOD value during spring from increased local sources, as well as long-range transport pollutants from East Asia that were carried by northeasterly winds. Overall, this study provides an understanding of the spatiotemporal variations in aerosols in the Philippines, which could be used in environmental management, air quality regulations, and health assessment studies. This shows the urgency of monitoring and mitigating poor air quality in the Philippines.

Fast-developing countries, particularly in Southeast Asia, are critically susceptible to high concentrations of inhalable fine particulate pollution (PM2.5), which threatens public health and economic development. This study evaluates the incremental reduction in PM2.5 concentrations and its potential health and economic benefits, focusing on sustainable air quality management in vulnerable communities, particularly in the fisheries sector in the Philippines. Using satellite-derived PM2.5 data and the Environmental Benefits Mapping and Analysis Program–Community Edition (BenMAP-CE) model, the estimated premature mortality rates and the associated costs under various concentration reduction scenarios (25%, 50%, 75%, and 100%) for the regions of Navotas, Bohol, and Davao Del Sur revealed substantial health and economic benefits. Under 25–50% reduction scenarios, it could prevent annual premature mortalities of 55–104 in the three regions, generating approximately USD 1.15 million in monetary benefits. A more considerable 75–100% reduction scenario could prevent up to 206 mortalities annually, yielding USD 2.07 million in monetary benefits. These benefits were notable in areas with higher baseline PM2.5 concentrations, such as Navotas and Davao Del Sur, which experienced significant reductions in premature mortality within the range of 1–3% of the fisherfolk population. These findings highlight the incremental reduction strategies in a sector-specific approach to protect vulnerable communities crucial for economic development. The developed approach aims to improve the air quality in fishing-dependent regions to ensure sustainable livelihoods across the Philippines while meeting national and global health targets.