Your Half-Eaten Sandwich's Dirty Secret
Your Half-Eaten Sandwich's Dirty Secret
By Kiera Butler / motherjones.com
Sep 17, 2013

Food waste is killing the planet. Here's how.

 
A full third of the world's food is wasted. According to a new report from the UN's Food and Agriculture Organization, discarded food accounts for a staggering amount of planet-warming greenhouse gas emissions. In fact, if food waste was a country, its 3.3 gigatonnes of emissions would make it the third highest-emitting country in the world, after China and the United States:

 

All charts reproduced with permission from the Food and Agriculture Organization of the United Nations

(LULUCF refers to "land use, land-use change, and forestry"—so this chart doesn't take into account all of the carbon emitted when a rainforest is converted to a farm, for example.)

What exactly makes all that waste and its emissions? It's not just consumers throwing dinner scraps away. Some food spoils before farmers can harvest it, other food goes bad on its way from the farm to the market, and still more food ends up rotting on supermarket shelves. Looking at emissions of uneaten food from farm to table, the researchers found that food wasted at the consumer phase had the highest carbon footprint. That's because by the time food gets to that stage, it's already accumulated emissions from production, harvest, and distribution. In other words, when chuck food that you buy at the supermarket, you're throwing away every part of the process that has gotten it there, as well:

 

 

Some kinds of food waste create more emissions than others. Wasted fruit, for example, has a relatively small ratio of food waste to carbon emitted. Meat's ratio is much larger. That's because meat production is exceptionally carbon intensive.

 

 

Food waste and emissions also vary by region. This graph shows that industrialized Asia (China, Japan, and South Korea) is far and away the largest contributor to both food waste and carbon emissions in the world:

 

 

But if you look at food waste's carbon footprint per person, North America and Oceania (United States, Canada, Australia, and New Zealand) is the winner—meaning the uneaten food produced by each citizen of North America and Oceania is responsible for more carbon emissions than that of each person in industrialized Asia. The report authors don't go into the reasons for this, but I'm guessing it has to do with the fact that North Americans waste more food overall—especially in the carbon-instensive consumer phase—than people most other regions.

 

 

Of course, carbon emissions are not the only way in which wasted food harms the environment. The report finds that wasted food consumes an amount of water almost three times as large as Switzerland's Lake Geneva— that's 60 percent more than Lake Tahoe. The authors also note that uneaten food could cover nearly 30 percent of the world's arable land.

And that's to say nothing of the human impact of all this food waste. By 2020, the global population is expected to hit 8 billion. How are we going to feed everyone? Some argue that we should use biotechnology to design higher yielding crops, while others believe that we simply must redistribute the food we already grow—enough to feed 12 billion people, my colleague Tom Philpott reports—more evenly. But surely figuring out how to eat the food that we produce instead of throwing it away would help, too.

 

Kiera Butler is a senior editor at Mother Jones. For more of her stories, click hereRSS | TWITTER

3.5 ·
1
Trending Today
MP Says Government is Intentionally Making People Destitute to Prevent Organised Opposition
2 min54,283 views today ·
Every Town Needs a Remakery
Jeremy Williams41,802 views today ·
Revolution and American Indians: “Marxism is as Alien to My Culture as Capitalism”
Russell Means36,225 views today ·
Carnage (2017)
65 min8,145 views today ·
Today I Rise: This Beautiful Short Film Is Like a Love Poem For Your Heart and Soul
4 min7,749 views today ·
Have We Been Denying Our Human Nature for Four Hundred Years?
Lynn Parramore4,925 views today ·
Without Saying a Word This 6 Minute Clip From Samsara Will Make You Speechless
6 min3,068 views today ·
Stressed out? This Weird, Relaxing And Life-Affirming Video May Be Just What You Need
3 min2,882 views today ·
Visit Hawai'i - The Occupied State
2 min2,517 views today ·
Load More
New
'Disaster': Trump Administration Signs off on Keystone XL Pipeline
Nika Knight
Escape From Syria - Faiza's Story
5 min
A Letter to Extremists
Nafeez Ahmed
Muslims This, ISIS That
3 min
Visit Hawai'i - The Occupied State
2 min
Musician Macka B. Schools Us on Benefits of a Plant-Based Diet
4 min
Carnage (2017)
65 min
Why Recognizing Our Own Privilege Can Be so Hard
Chris Agnos
Love is Not Something That You Do - It is Something That You Can Become
1 min
Load More
What's Next
Earth - The Climate Wars (2008)
177 min
Yes Men Pull Off Chamber Of Commerce Hoax On Climate Change
6 min
A Burning Question: Propaganda & The Denial Of Climate Change (2012)
52 min
Like us on Facebook?
Your Half-Eaten Sandwich's Dirty Secret