BEA's pollution abatement and control program (PAC) is being discontinued. The estimates presented in this article are the last of the annual series. BEA is reallocating resources away from some existing programs in order to move ahead with the most urgent priorities for maintaining and improving the U.S. economic accounts—national, regional, and international—as outlined last year in BEA's Mid-Decade Strategic Plan. In addition to discontinuing the PAC program, BEA has discontinued its regional projections program and has transferred the business cycle indicators to The Conference Board; BEA is also scaling back a joint project with the Bureau of the Census to obtain plant-level data on foreign direct investment in the United States from an annual series to a quinquennial series. BEA prepared its first set of PAC expenditure estimates in 1975 in response to the growing concern for the environment and the significant levels of public and private spending for PAC. Since then, BEA has produced PAC estimates on an annual basis.
The global commercial aircraft fleet in 2006 flew 31.26 million flights, burned 188.20 million metric tons of fuel, and covered 38.68 billion kilomete...
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