Study Finds Food Waste Is Third-Largest Greenhouse Gas Source

A new study from the U.N. Food and Agriculture Organization found that the 1.3 billion tons of food wasted every year make it one of the largest sources of greenhouse gas emissions.

1 minute read

September 12, 2013, 7:00 AM PDT

By Jonathan Nettler @nettsj


Reducing food waste can have myriad social, economic, and environmental benefits. But a new report has put a number to the impact on global warming that uneaten food has every year. "The world throws away one-third of food produced yearly, making food waste the third-largest source of greenhouse gas emissions behind those produced by the U.S. and China, according to a U.N. report released Wednesday," writes Ricardo Lopez. "[T]he U.N. estimated the carbon footprint of the problem is equivalent to 3.3 billion tons of carbon dioxide every year."

"All of us -- farmers and fishers, food processors and supermarkets, local and national governments, individual consumers -- must make changes at every link of the human food chain to prevent food wastage from happening in the first place, and re-use or recycle it when we can't," said FAO Director-General José Graziano da Silva. 

Wednesday, September 11, 2013 in Los Angeles Times

"Planetizen federal action tracker" logo superimposed over black and white image of US Capitol dome.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

October 28, 2026 - Zachary Whalen

A car drives through a puddle, making a large splash. Rain pours down.

California plans to bury El Niño’s downpour

If the state plays its cards right, it may be able to store a billion acre-feet of El Niño’s water in aquifers.

October 28, 2026 - Grist

Lake Powell with much of the water evaporated.

Desperate measures: Advocates weigh draining Lake Powell to fill Colorado River

Draining the reservoir could reduce evaporation losses by a couple hundred thousand acre-feet.

October 30, 2026 - Yale Environment 360

People vote in Chicago behind blue privacy screens

Chicago voters approve permanent festival grounds, penalty for vacant property owners

Currently, major summer and fall festivals take over public parks for weeks at a time, drawing criticism from nearby residents

November 5 - Block Club Chicago

Mayor Zohran Mamdani speaks into a microphone. He wears a gray suit.

NYC votes to cut outdoor dining red tape, speed up permitting

New York City also voted to allow the Department of Transportation to begin work on urgent projects before notifying elected officials.

November 5 - The City Reporter

People in Los Angeles going to the polls, following a sign with an "I Voted" design

California appears to reject Prop. 45

The proposition would have expanded the projects that qualify for a streamlined environmental review, effectively paring down the California Environmental Quality Act.

November 5 - Cal Matters