Stacked bar charts show more than one set of information in each bar. The bar chart below shows sources of air pollution in Victoria, Australia and percentage rates of how heavily these sources are polluting the air.
STACKED BAR CHART %
100– 90– 80– 70– 60– 50– 40– 30– 20– 10– 0–
KEY
CO = Carbon Monoxide NOx = Nitrogen oxides
PM10 = Very small particles of dust % CO NOx PM10 Benzene
Motor Vehicles Industry
Commercial/domestic Other
Fig. 13 Stacked bar chart showing air pollution sources in Victoria, Australia EXERCISE
Examine Fig. 13. (a) What percentage of CO air pollution is due to (i) industry and (ii) other sources?
(b) What percentage of PM10 pollution is due to commerical/domestic sources?
(c) What percentage of Benzene pollution is due to motor vehicles?