Suzanne Paulson, UCLA professor of atmospheric and oceanic sciences, saw "Carmageddon" as an opportunity to make use of a "natural experiment." She and a colleague "measured pollutants in the air during the LA freeway shutdown last year, and have now released their findings.
Air quality near the normally busy highway improved by 83 percent that day last July, relative to comparable weekends. Elsewhere in West Los Angeles, the improvement was equally dramatic. Air quality improved by 75 percent on that side of the city and in Santa Monica, and by 25 percent throughout the entire region, as a measure of the drop in ultrafine particulate matter associated with tailpipe emissions.
"We saw what we expected: you take motor vehicles away, the air gets really, really clean," Paulson says, "which tells us that most of the pollution is from motor vehicles from one type or another in this area."
More: L.A.'s 'Carmageddon' Produced Dramatic, Instantaneous Air Quality Improvements (The Atlantic).
Another "Carmaggedon" just took place in LA
. Wonder if there will be more science to come from this edition.
(Image: Dallas Traffic 10/19/11 1227pm, a Creative Commons Attribution Non-Commercial Share-Alike (2.0) image from nffcnnr's photostream)
Almost all of Canada’s tar sands production has been shut down by a raging wildfire in Alberta’s Fort McMurray region.
Jeremy Buckingham, a Green Party MP, took a dingy out on Queensland’s Condamine River, about 220km west of Brisbane, and set the river on fire with a barbeque lighter.
Becky Stern writes, “I recently investigated my building’s new smart radiator cover installation and found a company bringing steam heat into the 21st century and allowing residents to keep their windows closed when the heat is on!”
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