A new study suggests that Ho Chi Minh City's air pollution sources may have been incorrectly identified for years. Researchers have found that relying on levoglucosan as the primary tracer for biomass burning PM2.5 could lead to significant mischaracterization of emission sources.
The chemical levoglucosan is produced when cellulose burns, making it a common marker for biomass combustion from residential fuel use and open burning. However, the study indicates that this approach may overlook other major contributors or misattribute pollution from different sources in the city's complex urban environment.
Biomass burning, including wood, charcoal, and agricultural residues, is a known major source of fine particulate matter that degrades air quality. The research highlights that current tracking methods may not fully capture the true composition and origin of harmful particles affecting public health.
If the findings hold, policymakers may need to revise emission inventories and mitigation strategies. The misreading of pollution sources could have delayed effective interventions to reduce PM2.5 exposure for millions of residents.
The study's authors call for more comprehensive monitoring techniques beyond single-chemical tracers. Further research is needed to validate these findings and develop a clearer picture of Ho Chi Minh City's air quality challenges.