Staff of the California Air Resources Board have just published the 2005 edition of The California Almanac of Emissions and Air Quality. It is data- and chart-rich, with extremely clear explanations about the different types of pollutants and methods for analyzing the different data. The landing page for the report is here.
The entire report can be downloaded as well as an Excel version of all the tables.
The Almanac, which also forecasts emissions through 2020, reveals several things:
First, the tremendous progress that has been made over the last few decades.
Second, the magnitude of the challenge in the future.
Vehicles contribute some 67% of California’s air pollution—and while the state’s population continues to grow rapidly, the Vehicle Miles Travelled (VMT) grows even faster.
The Almanac forecasts the following changes in population and VMT for the different regions of California:
|% Growth in Population and VMT, 2005–2020|
|Air Basin Region||Population||VMT|
|San Francisco Bay||12.7%||23.9%|
|San Joaquin Valley||35.3%||44.0%|
This forecast takes California in fifteen years from a state that in 2005 will have a population of 37.5 million driving 872.9 million miles per day to one that in 2020 will have a population of 45.8 million that drives 1.1 billion miles per day.
In other words, not only is California adding population—and motor vehicles—at a rapid rate, that population and those new cars are driving more than ever.
Progress has been made—but more will be required.