The pie chart illustrate the proportion of source contributions to the annual PM concentrations in tashkent.
Overall, it is evident that boundary and windblown dust accounted for the greatest share of the total, whereas waste burning represented only a minimal proportion. The remaining categories occupied moderate percentages, with noticeable disparities between the dominant and less significant segments.
In greater detail, boundary and windblown dust constituted 36%, making it by far the most substantial component. This figure was considerably higher than that of residential and commercial heating, which stood at 29%. Meanwhile, transport accounted for 16%, positioning it within the mid-range of the distribution. Together, these three categories comprised 81%, indicating that a significant majority of the total was concentrated within these sectors.
By contrast, light industry represented a comparatively modest share at 7%, while hevay industry and urban dust recorded at 6% respectively. Finally, waste burning comprised just 1%, thereby exerting only a negligible influence on the overall breakdown.