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

Young Professional

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban and Environmental Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban and Environmental Planner

Get top-rated, practical training for planners

"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.

September 16, 2026 - Zachary Whalen

Passengers board an Amtrak train under a cloudy sky.

Amtrak, CN end decades-long dispute with eight-year agreement

The new operating agreement establishes an updated framework for the companies to work together, including processes to resolve disputes.

September 18, 2026 - Mass Transit

The Gross Reservoir, a large body of water surrounded by trees and mountains.

Judges permit Denver to divert 77,000 acre feet from the Colorado River for reservoir expansion

Overuse and climate change have caused the Colorado River’s water levels to plummet.

September 18, 2026 - Inside Climate News

A painted bus lane in NYC.

NYC DOT wants faster, more permanent street upgrades

The city is examining ways to build more concrete infrastructure without getting entangled in 'decades-long' projects.

September 21 - NYC Streetsblog

A woman looks at a utility bill.

'Something we’ve never seen before:' rising utility rates could strain city finances nationwide

Data centers, climate change and other factors have caused utility rates in the United States to increase by 38% since 2020.

September 21 - Smart Cities Dive

A person scuba diving in a coral reef off Guam.

Trump to overrule local leaders, lease millions of acres of America’s Pacific Island territories’ seafloors to mining companies

International law says that the Indigenous people of America’s territories have a right to prior and informed consent regarding projects that impact their countries.

September 21 - Grist