Apr 27 2008
Eating a Low Carbon Diet – Healthier for you and the planet
We are always looking for ways to lessen our impact on the environment, and to improve our health.
It turns out that you can do both at the same time. Lowering the carbon footprint of your diet will also result in a healthier, lower fat, and lower cholesterol diet.
The problem is significant. Food now travels the globe in ways that were unimaginable just a few years ago.
Cod caught off Norway is shipped to China to be turned into filets, then shipped back to Norway for sale. Argentine lemons fill supermarket shelves on the Citrus Coast of Spain, as local lemons rot on the ground. Half of Europe’s peas are grown and packaged in Kenya.
There are estimates that up to 30% of greenhouse gases are a result of the food system. Among the key contributors
- Methane gas produced by cows and sheep
- Nitrous oxide from nitrogen fertilizers and animal waste
- CO2 from the processing and transport of food
Transport, at this time is a small, but growing portion of the total.
The European Union, the world’s leading food importer, has increased imports 20 percent in the last five years. The value of fresh fruit and vegetables imported by the United States, in second place, nearly doubled from 2000 to 2006.
The increasing mobility of food has brought many benefits, more varied diets, better nutrition, and income to some of the poorer areas of the world. Not only that, but as consumers, we enjoy fresh fruits and vegetable available all year. Kiwi fruit are now grown in New Zealand, Italy, or Iran. The result? Kiwis all year.
But the mobility of food, comes with a price tag, pollution and increased emissions of greenhouse gases. Transporting fresh food usually needs to be done by air, which is the least fuel efficient method of transport, and often require refrigeration, adding to the carbon footprint.
The problem is being attacked in several directions.
- The EU is considering a number of moves, such as including freight carrying flights into and out of the EU in their emissions trading programs
- Tesco, and other retailers are looking at providing carbon footprint information about their products
- Economists are advocating the elimination of the tax exemption on fuel used for air or sea transport of freight (the result of a 1944 treaty designed to help the fledging airline industry)
- Non profits such as the Society for Environmental Toxicology and Chemistry (SETAC) are working on techniques such a Life Cycle Assessment to
… address the environmental aspects and potential environmental impacts (e.g. resource use and environmental consequences of releases) throughout a product’s life cycle from raw material acquisition through production, use, end-of-life treatment and disposal (i.e. cradle-to-grave)
If you would like to assess the impact of your diet, check out Eat Low Carbon - they have a fun tool to calculate the carbon emission of your meals.
The Contra Costa times provided this list of tips for reducing the carbon footprint of your meals. Overall they lead to a healthier diet as well
- Increase your intake of fresh, seasonal vegetables. Avoid hothouse-grown vegetables.
- Reduce your intake of meat (particularly beef, lamb, and sheep) and consume less dairy. Eat them less often and/or in smaller amounts.
- Buy and cook only enough to eat. More than 30 percent of food that is purchased at markets is wasted.
- Reduce your total food miles. This includes buying local food but also how often you drive to go shopping. Shop for the week, not for the day
- Avoid eating processed and packaged foods
- Plant a garden. Nothing is as carbon friendly as something you grew yourself!

