Emission and Growth Trends 120
100
Vehicle miles traveled
60
Energy consumption
Percent change
20
0
Aggregate emissions
(six common pollutants)
220
240
260
1980
1995
1998
2001
2004
2007
Year
Figure 6-3
What is a valid conclusion that can be drawn from the graph in Figure 6-3 above?
O As the years go by, the number of miles traveled decreases
Although people are traveling more by car, pollution has decreased,
Pollution was at about 120 percent change in 2007
Energy consumption has changed more than total emissions and vehicle miles traveled.