Think Global, Eat Local?
Monday, March 3rd, 2008by Stacey
Well, I’m back! I just spent a week in Cabo San Lucas Mexico with my family and my parents. Much fun. It was beautiful and sunny and we ate lots of yummy Mexican food.
I thought I’d return with a post about this thoughtful article in last week’s New Yorker magazine about eco-consumption. It’s an interesting piece that I recommend to anyone who is concerned about green living.
For me, one of the most compelling parts was about eating locally grown food. Most of us who pay attention to these sorts of things believe that locally grown food carries less of a carbon footprint than food that has traveled halfway around the world.
“Have a quick rifle through your cupboards and fridge and jot down a note of the countries of origin for each food product,” Mark Lynas wrote in his popular handbook “Carbon Counter,” published last year by HarperCollins. “The further the distance it has traveled, the bigger the carbon penalty.”
Scientists have also backed up this thinking.
Agricultural researchers at the University of Iowa have reported that the food miles attached to items that one buys in a grocery store are twenty-seven times higher than those for goods bought from local sources. American produce travels an average of nearly fifteen hundred miles before we eat it.
It makes sense that it would be better for the environment if I bought my food at the local farmer’s market where the produce was grown nearby and driven only a few miles to get to me. Doesn’t it?
Apparently not. The article says the relationship between food miles and their carbon footprint is not nearly as clear as it might seem. That is often true even when the environmental impact of shipping goods by air is taken into consideration.
“People should stop talking about food miles,” Adrian Williams told [the writer]. “It’s a foolish concept: provincial, damaging, and simplistic.” Williams is an agricultural researcher in the Natural Resources Department of Cranfield University, in England. He has been commissioned by the British government to analyze the relative environmental impacts of a number of foods.
“The idea that a product travels a certain distance and is therefore worse than one you raised nearby—well, it’s just idiotic,” he said. “It doesn’t take into consideration the land use, the type of transportation, the weather, or even the season.”
Many factors influence the carbon footprint of a product: water use, cultivation and harvesting methods, quantity and type of fertilizer, even the type of fuel used to make the package, the article says. For example, take apples.
The environmental burden imposed by importing apples from New Zealand to Northern Europe or New York can be lower than if the apples were raised fifty miles away. “In New Zealand, they have more sunshine than in the U.K., which helps productivity,” Williams explained. That means the yield of New Zealand apples far exceeds the yield of those grown in northern climates, so the energy required for farmers to grow the crop is correspondingly lower. It also helps that the electricity in New Zealand is mostly generated by renewable sources, none of which emit large amounts of CO2.
“Everyone always wants to make ethical choices about the food they eat and the things they buy,” he told me. “And they should. It’s just that what seems obvious often is not. And we need to make sure people understand that before they make decisions on how they ought to live.”
I have no doubt that we’re on the right track as mothers who want to try to protect and save this planet for our kids and our grandkids. I hope the science of how to do that keeps pace with us. What do you think?
Sphere: Related Content