Several Eat Local Challenge bloggers have mentioned that they wonder whether they are doing anything for the environment and pollution in buying local foods when it usually means driving more in order to go to many different locations to gather their food. To help us with this question, I have called on a good friend, Jennifer Finton. Jen is the Policy Manager of the American Lung Association of Sacramento-Emigrant Trails, and spends much of her time on pollution, transportation, and land use issues.
In general, can you talk about the types of pollution trucks bring into an area, and what that does for the environment?
Most of the trucks used for transporting goods in a region have diesel engines. Diesel engines being made today are much cleaner than older versions, however, diesel engines are workhorses and last an average of 30 years. Since 1990, diesel exhaust has been listed as a known carcinogen under California's Proposition 65, and in 1998, the California Air Resources Board (CARB) formally listed diesel particulate as a toxic air contaminant. The extensive scientific literature demonstrates that exposure to diesel exhaust increases the risk of developing lung cancer and other non-cancer health problems.
Are those types of pollutants something that average cars don't give off?
Yes and
no. The "average" car is much cleaner than an "average" diesel engine on the
road today. However, cars and trucks both emit pollutants in varying degrees
that can be harmful to lungs, both in the short and the long term. While newer
cars are polluting less overall, recent data shows that they are traveling more
miles than ever before.
Can you talk about "goods movement" - what it means, and how it affects our lives?
With globalization and a market driven economy, efficiency and low prices are the name of the game. Notice all of the "box stores" in our communities. With an increase in the number of these stores, demand for these discount goods increases, therefore increasing the number of trucks, trains and ships needed to transport them, especially from overseas. More transportation modes often equate to more pollution. You'll need more trucks to get the containers from more trains, that are loaded from more ships. Studies show that trains, trucks and ships are some of the highest polluting mobile sources. An increase in these modes without cleaner engines does not bode well for lung health.
So is it a natural conclusion to assume that buying more things that don't have to be brought on ship, train or truck would eventually help air quality by cutting down on the number of ships / trains / trucks? Or at least not increasing that demand?
Right. theoretically, until we can come up with readily available, inexpensive cleaner technology for the engines in those ships/trains/trucks.
So, let's just say that in a perfect world, the Eat Local Challenge completely takes off and half the population is doing it ... buying more goods locally. A lot of times, that would mean trips to more places (as opposed to one big box market) and breaking up our errands to lots of little places. What could that mean for congestion and pollution?
Well, if half the population is doing it, there would probably be a better method for obtaining local goods. But, in light of how to go about it at this point in time -- Recognize that you're eating local for other reasons than to save money and time (for the most part). You are choosing this "battle", but to look at the whole picture, the trade-offs become complicated.
What's the #1 thing that we can take into consideration while eating local?
For this month of eating local, combining your errands, whether they are food-buying related or not, is the best strategy if you are shopping by car. Well-maintained cars are equipped to run cleaner after the engine is warm. Your car pollutes more in the first few minutes of driving. By combining errands, even if that means starting and stopping your engine for brief periods of time, is better for air pollution than running errands sporadically throughout the day. Of course, walking, biking, carpooling and taking transit may cut down on the cost, provide a health benefit by combining exercise and pollute the least of all modes.
Talking to you, one thing that I would personally probably focus on would be to frequent farmer's markets that are purposefully put at transportation hubs -- just supporting that effort, I guess.
Right, a perfect combination. There's some cross promotion going on here in Sacramento between our transit and the Farmer's Markets.
Anything else we should talk about?
Well, one thing is to keep an eye out for companies that are upgrading their diesel engines. There are some great programs out there to upgrade or replace diesel engines a little cost to the operator.
And to close, it's obvious the Locavores and anyone participating in this challenge care about what they eat and where it comes from and I appreciate that they recognize that this stuff doesn't happen in a vacuum. It's about choices and we can continue making sure we have choices by becoming active and involved in our communities and supporting those businesses that are sustainable. It's the whole, "vote with your fork" mentality, but carried throughout your life.
Thanks so much, Jen. This has been really helpful.
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