Source Contributions of PM<sub>2.5</sub> in the Severe Haze Episode in Hebei Cities

<div>The contribution of sectors to PM<sub>2.5</sub> concentrations in Hebei from 1 January to 28 February 2013.</div>

The Scientific World Journal

Figure 3: Source Contributions of PM<sub>2.5</sub> in the Severe Haze Episode in Hebei Cities 