Planet Gore

The Science isn’t Settled Part 1,785,890

California was only off by 340% when calculating the estimated pollution from diesel trucks. San Francisco Chronicle:

California grossly miscalculated pollution levels in a scientific analysis used to toughen the state’s clean-air standards, and scientists have spent the past several months revising data and planning a significant weakening of the landmark regulation, The Chronicle has found.

The pollution estimate in question was too high – by 340 percent, according to the California Air Resources Board, the state agency charged with researching and adopting air quality standards. The estimate was a key part in the creation of a regulation adopted by the Air Resources Board in 2007, a rule that forces businesses to cut diesel emissions by replacing or making costly upgrades to heavy-duty, diesel-fueled off-road vehicles used in construction and other industries.

The staff of the powerful and widely respected Air Resources Board said the overestimate is largely due to the board calculating emissions before the economy slumped, which halted the use of many of the 150,000 diesel-exhaust-spewing vehicles in California. Independent researchers, however, found huge overestimates in the air board’s work on diesel emissions and attributed the flawed work to a faulty method of calculation – not the economic downturn.

The rest here.

This is an issue PG has covered in the past. I wonder if the Los Angeles Times would now like to correct this alarmist statement on the deaths from diesel-pollution made in 2009?

The clean-truck program at the ports of Los Angeles and Long Beach, a long-overdue attempt to reduce the diesel pollution that sickens and kills thousands of Angelenos every year, forces truckers to buy cleaner, more modern vehicles and imposes a fee on shipping containers that pass through the ports in order to help pay for them. None of that is controversial, and if that were all the program did, it wouldn’t be enriching an armada of lawyers. But it also contains concession agreements that the U.S. 9th Circuit Court of Appeals has determined will probably be ruled unconstitutional.

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