Figure 1From: Investigating health effects in a community surrounding a road tunnel stack – a cross sectional study Modelled annual concentrations of oxides of nitrogen from stack emissions, and February 2002 – January 2003 sampling zones. (Upper figure). ---------(Black line) incremental annual NOx ug/m3 above averaged background of 60 ug/m3. ---------(Green line) topographic contours. T1, U1, X1, T3, CBMS – Air monitoring stations. Red dot – Stack location.Back to article page