Suchergebnisse

Exposure to fine particles in ambient air has been estimated to be one of the leading environmental health risks in Finland. Residential wood combustion is the largest domestic source of fine particles, and there is increasing political interest in finding feasible measures to reduce those emissions. In this paper, we present the PM(2.5) emissions from residential wood combustion in Finland, as well as the resulting concentrations. We used population-weighed concentrations in a 250 × 250 m grid as population exposure estimates, with which we calculated the disease burden of the emissions. Compared to a projected baseline scenario, we studied the effect of chosen reduction measures in several abatement scenarios. In 2015, the resulting annual average concentrations were between 0.5 and 2 µg/m(3) in the proximity of most cities, and disease burden attributable to residential wood combustion was estimated to be 3400 disability-adjusted life years (DALY) and 200 deaths. Disease burden decreased by 8% in the 2030 baseline scenario and by an additional 63% in the maximum feasible reduction scenario. Informational campaigns and improvement of the sauna stove stock were assessed to be the most feasible abatement measures to be implemented in national air quality policies.

Abstract
Recently, the causal associations between traffic emissions and health effects were strengthened by the systematic reviews by the Health Effects Institute (HEI#23, 2022). According to EuroStat data Europeans spend 87-97% of their time indoors in homes, workplaces, schools and nurseries. Breathing volumes are dominated by the time spent indoors (16 m³ indoors and 1.4 m³ outdoors), even though breathing rates in outdoor environments are higher. This demonstrates the importance of taking into account time activity as well as infiltration to indoor spaces when estimating intake of particles.
The ULTRHAS project aims to link in vitro toxicological evidence for particulate matter to health impact assessments to look specifically into this. An integrated exposure pathway model will consider for different microenvironments, and physical activity patterns to quantify the particle intake in selected gender and age groups. Relative to the commonly applied approach using residential address and corresponding outdoor pollution levels we specifically add handling of (i) infiltration into indoor spaces and (ii) variability in breathing volumes based on physical activities. The model will provide inhalation volumes for selected target populations, to be applied in the intake-DALY estimation of burden of disease parameters in the following phases of the project.