Figure 1:	Toronto/Egbert 1998 Winter/Spring Special Study
Figure 2:	Toronto/Egbert 1998 Summer Special Study
Figure 3:	US/Canadian Acid Gas Emissions (1995)
Figure 4:	US Sources of PM2.5 from the Transportation Sector
Figure 5:	Canadian Sources of PM2.5 from the Transportation Sector
Figure 6:	Unit risk estimates from diesel exhaust particulates
Figure 7:	Model Year Distribution of In-Use Truck Fleet in 1993
Figure 8:	Temperature changes over time
Figure 9:	Size Distribution of US Coal-Fired Power Plants, 1994
Figure 10:	Canada's Benzene Sources (1995)
Figure 11:	Average Sources of Benzene Exposure to Humans