Friday, January 08, 2010
From the Classroom: Ozone, Air Pollution, and the EPA
I have also posted here in the past some short pieces I've written originally for the students in one of my Geography classes at Santa Monica College. I've done this whenever I've written something that I thought might be of broader interest. Such is the case today, and I've decided to present it as the first of a new, occasional series on this blog I'm calling "From the Classroom".
Yesterday in my Introduction to Physical Geography class, I briefly covered the topic of air pollution. Following the lead of the really superb textbook I use in that class--Robert Chistopherson's Geosystems--I made a point to emphasize the profound progress made in the United States since the passage of the first Clean Air Act in 1970. As if on cue, today's New York Times included an article discussing proposed new air-pollution standards by the U.S. government. I shared a link to the article with my students, along with the following thoughts
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Note how today's debate continues to center around economic estimates: the billions of dollars it will cost government and industry to comply with the new standards and the billions of dollars--perhaps fewer, perhaps more--that society promises to save through improved public health. As a map accompanying the article shows, this is particularly significant for California (not just metro LA), where most of the counties already fail to meet current standards, making new stricter standards even more challenging and expensive to satisfy.
The new standards being proposed concern ozone. While this is the same three-oxygen-atom compound we discussed yesterday in class with respect to CFCs and the stratosphere, the ozone issue here is a different one. Up in the stratosphere, ozone is our "friend" as it protects us from UV radiation, and the concern is that human activity is causing a decrease in ozone, way up there. This air-pollution article, however, discusses ozone near the ground, at the bottom of the troposphere, where just the opposite situation is at play. Ozone down here is our "enemy", a harmful, unhealthful pollutant that human activity is causing to increase, hence the desire for government regulations to place an upper limit on its allowable concentration.
Ground-level ozone is one of the most significant components of "smog". It is formed in the atmosphere, especially on warm, sunny, calm days, which allow photochemical (i.e., sunlight-driven) reactions to create ozone out of various industrial emissions such as hydrocarbons and nitrogen oxides. Ozone is a major concern because it's a very powerful oxidant which works an awful lot like household bleach, killing living cells (including skin cells and those that line our lungs) on contact. As a former high-school cross-country runner who grew up in the "smog belt" of the Pomona Valley during the early 1980s, I can personally testify to just how painfully searing within one's chest outdoor exercise often could be back then. Sometimes I'm amazed that I can still breathe at all today, given the torture through which my coaches and I put my young body. The resilience of youth, I suppose.
Ozone similarly harms other living things in our environment, and can damage rubber and plastics as well. Through a chain of connections, this amplifies the full impact and cost of air pollution. For example, several decades of 20th-century air pollution have significantly contributed to the severe wildfire hazard in the mountains around Southern California. Always prone to fire, our forests today are even more so because they include large stands of dry, dying trees suffering from a major bark-beetle infestation. This may seem like an unfortunate "natural" event, but one of the reasons why the bark beetles have been able to thrive is that otherwise healthy trees were weakened by all the ozone pollution. (Drought and artificial fire suppression are additional significant factors.)
While continuing to sound the alarm about air pollution, we do also need to appreciate the phenomenal progress that we have already made. Yes, much of California continues to fall short of the current federal standard (ozone concentrations of no more than 0.075 parts per million), let alone the newly proposed stricter standards. But it's also worth mentioning how far we've come in the last few decades, despite the region's continuing economic and demographic growth. Within the Los Angeles basin, for example, there were 121 days in 1977 during which a "Stage 1 Smog Alert" was declared, which means local ozone levels on those days were greater than 0.20 PPM--nearly three times the current federal standard. Thanks largely to cleaner-burning automobiles, the number of Stage 1 alerts dropped to 66 in 1987, and to only 1 in all of 1997. There have been none since. We also haven't had a "Stage 2" alert (> 0.35 PPM) since 1988; that's a remarkable accomplishment. While getting a "smog check" done on your car can certainly be annoying, and it also adds to the expense of ownership and operation, keep in mind the benefits we enjoy every day through our radically improved air quality. One final set of numbers to share: an average 1965 Chevy Malibu emitted 8.8 grams of hydrocarbons and 3.6 grams of nitrogen oxides every mile; by 2003, a Chevy Malibu emitted only 0.6 and 0.1 grams of each. No wonder our air has gotten so much cleaner.
We still have some days in Southern California when the ozone levels are high enough to detect its distinctive "electrical" or "lightning-y" odor. It's an aroma that doesn't exactly bring back fond memories for me or many other Southern Californians who can remember the bad old days of the previous century.
FYI, in addition to the article in the New York Times, most of the numbers stated above I found through either the FDA's official website on ozone or another helpful one from the State of California.
Friday, June 08, 2007
reason number 42 to bike commute:
Wednesday, June 06, 2007
stay off the sidewalk
Wednesday, May 30, 2007
reason number 97 to bike commute ...
Monday, December 25, 2006
you know you're old when ...
Friday, December 15, 2006
beachfront racism along santa monica bay
- 1902 - Manhattan Beach emerges as one of many oceanside resort developments on Santa Monica Bay
- 1911 - Standard Oil builds its refinery at El Segundo (the second refinery in California, hence the name), and MB booms as a residential suburb for oil workers
- 1912 - MB codeveloper George Peck progressively sets aside two beachfront blocks for nonwhite (i.e., black) property owners, who were otherwise excluded from owning beachfront property anywhere in Southern California. Willie Bruce and her husband Charles are the first to buy property and they build a small resort for blacks, complete with cafe, dance hall, and fishing pier. This becomes known as Bruces Beach.
- 1924 - After years of racist challenge to the Bruces' existence, including from a local chapter of the KKK, the city of MB uses eminent domain to acquire the property, move all the non-white residents out, in order to presumably build a park. The city's real motivation, though, to "ethnically cleanse" the area became apparent when the park wasn't actually built until the 1950s.
- For more on LA's rich black history, click here.
- Those interested in the challenge of providing public access to our beaches will want to check out this publication from the Surfrider Foundation.
Sunday, December 10, 2006
it's about time
Wednesday, September 27, 2006
subway smells
Wednesday, May 17, 2006
my bike commute: first-quarter 2006 report
- I commuted by bike on 29 of the quarter's 49 teaching days, or 59% of the time, for a total 1371 km and 60 hours.
- 11 of the 20 car-driving days occurred in March, due to injury and/or rain
- Estimated quarterly gas-money savings of about $100. During the first quarter of this year, I purchased only 35.4 gallons (=$93 @ $2.64/g) of gas, compared to 87.5 gallons (=$203 @ $2.32/g) during the first quarter of 2005, when I wasn't bike commuting regularly. That's an apparent year-to-year savings of $110. I figure every bike-commuting day saves me about a gallon of gas. Thus, when bike-commuting 100% of the time, and not just 60%, and with gas prices now well over $3 per gallon, I figure my monthly savings could easily top $50. That's enough to pay for my satellite TV service at home. Add in all the calories I'm buring by riding to work, and that adds up to truly guilt-free couch-potato time.
Monday, May 08, 2006
gustavo arellano on anti-mexican o.c.
I'm a fourth-generation descendant of naranjeros (orange pickers), barely speak Spanish and am lighter-skinned than most of my gabacho friends. Still, a couple of years ago, I attended a fundraiser at the Balboa Bay Club — the Musso & Frank's for O.C.'s old money, and John Wayne's favorite drinking well — and while I was standing in line for a horrid Mexican buffet, a skinny, prissy thing approached. She asked if I could serve her some beans. I laughed. While I waited for the valet later that night, the same woman asked if I could grab her car. "Not unless you want it on cinder blocks," I replied. My Camry arrived. I paid the $5 charge and slipped the Mexican valet an extra $20.By the way, gabacho is just one of many local-Spanish/Spanglish words that one will pick up from reading Arellano's work. Kind of like "gringo", it's Mexican-Spanish slang for an English-speaking "white" person, but it really carries the more specific connotation of a white USAmerican--particularly one with a personal identity and political orientation tied closely to the idea of a monolithic Anglo-American norm, as opposed to a more multicultural orientation, and thus displaying immense historical and geographical ignorance about the diverse and plentiful contributions of brown-skinned, Spanish speakers (not to mention other non-Anglo ethnicities) to USAmerican culture and society. I don't know the full history or etymology of the word, but my understanding is that it derives from centuries-old pejorative slang used in Spain to describe someone from France, in particular peasants in the Pyrenees. Given the history of French occupation of Mexico during the 1860s, it's understandable that the same word would evolve with additional political freight here in the Americas. Another useful source for the ever-evolving worlds of modern slang is the on-line urban dictionary.
Wednesday, May 03, 2006
pete's world cycling rankings, 2006.1
no more excuses: ride your bike!
- the roads belong to bicycles no less than cars and you must never shy from asserting your rightful place on the road--you're a human-powered vehicle, not a wheeled pedestrian;
- in a physical confrontation between car and bike, you lose, so temper your assertiveness with proactive, defensive caution.
- Forester's website
- Forester's book
- another highly recommended book (but one I've yet to read)
Sunday, April 30, 2006
another intellectual icon passes
globalization and the two chinas
Tuesday, April 04, 2006
bike-friendly amsterdam?
- an American photographer discussing her new album of everyday Amsterdam on bikes
- an article detailing a Portland, Oregon, delegation's visit last year (and an accompanying blog report)
Monday, March 13, 2006
are you kidding me?
Monday, March 06, 2006
crash!
Tuesday, February 28, 2006
life on the streets
The migalka, a flashing blue siren that sits on top of sleek black cars, inspires road rage in even the calmest Moscow driver (of which there are few). Left over from Soviet times, migalkas are seemingly ubiquitous, a symbol of official privilege available to anyone with political connections or very deep pockets. Like the sirens of police cars, migalkas enable drivers to run red lights, rush down the wrong side of the road and even lurch onto sidewalks. Anger about these sirens boiled over in Moscow on February 12th, when 1,000 cars took to the streets in protest, many of them brandishing signs slamming the “hot rods with sirens”.
This ire is justified. In 2005 the governor of the Siberian Altai region was killed in an accident: armed with a migalka, he drove down the wrong side of the road at 200kmph and ran into a car making a left turn. In early February, a court found the other driver guilty of the governor's death, and sentenced him to four years in a labour colony. The verdict caused outrage across the country and inspired the Moscow demonstration. Participants said their action was part of a demand for fairness and equality before the law. Alas, the protest cars quickly got caught in Saturday traffic. Their route was further obstructed by traffic police, stationed every kilometre to break up the convoy.
Stories like these shouldn't keep us from observing and agitating against the very real problems that we face on the streets and highways of California and the USA. But they should at least give us pause for thought to appreciate how good we truly have it. Indeed, given how law- and rule-abiding the vast majority of American motorists are, it's really shameful that we have so far still to go in devising such rules and laws to make our streets safer and more convenient for all of us, no matter what mode of transport we're employing at the time.
