The Carbon Footprint of the Food Supply Chain
Which Foods Have the Greatest Environmental Impact?
The quantity of greenhouse gases (GHGs) generated by our food can vary considerably across the global food supply chain.
In fact, the difference between specific food types can vary by orders of magnitude, meaning what we eat could be a significant factor impacting GHG emissions on the environment.
Today’s modified chart from Our World in Data relies on data from the largest meta-analysis of food systems in history. The study, published in Science was led by Joseph Poore and Thomas Nemecek to highlight the carbon footprint across different food types across the world.
The Foods With the Highest Carbon Footprint
Worldwide, there are approximately 13.7 billion metric tons of carbon dioxide equivalents (CO2e) emitted through the food supply chain per year.
Across a database extending through 119 countries and 38,000 commercial farms, the study found that, unsurprisingly, beef and other animal products have an outsize effect on emissions.
For example, one kilogram (kg) of beef results in 60 kg of GHG emissions—nearly 2.5x the closest food type, lamb and mutton. In contrast, the same weight of apples produce less than one kilogram of GHG emissions.
|Food Type||GHG Emissions per 1 kg Produced|
|Beef (beef herd)||60 kgCO2e|
|Lamb & Mutton||24 kgCO2e|
|Beef (dairy herd)||21 kgCO2e|
|Prawns (farmed)||12 kgCO2e|
|Palm Oil||8 kgCO2e|
|Pig Meat||7 kgCO2e|
|Poultry Meat||6 kgCO2e|
|Olive Oil||6 kgCO2e|
|Fish (farmed)||5 kgCO2e|
|Fish (wild catch)||3 kgCO2e|
|Cane Sugar||3 kgCO2e|
|Wheat & Rye||1.4 kgCO2e|
|Maize (Corn)||1.0 kgCO2e|
|Root Vegetables||0.4 kgCO2e|
|Citrus Fruits||0.3 kgCO2e|
When it comes to plant-based foods, chocolate is among the highest GHG emitters. One kilogram of chocolate produces 19 kg of GHGs. On average, emissions from plant-based foods are 10 to 50 times lower than animal-based types.
Bottom line, it is clear that the spectrum of emissions differs significantly across each food type.
Food Supply Chain Stages
The food supply chain is complex and nuanced as it moves across each stage of the cycle.
Although the steps behind the supply chain for individual foods can vary considerably, each typically has seven stages:
- Land Use Change
- Animal Feed
Across all foods, the land use and farm stages of the supply chain account for 80% of GHG emissions. In beef production, for example, there are three key contributing factors to the carbon footprint at these stages: animal feed, land conversion, and methane production from cows. In the U.S., beef production accounts for 40% of total livestock-related land use domestically.
On the other end of the spectrum is transportation. This stage of the supply chain makes up 10% of total GHG emissions on average. When it comes to beef, the proportion of GHGs that transportation emits is even smaller, at just 0.5% of total emissions.
Contrary to popular belief, sourcing food locally may not help GHG emissions in a very significant way, especially in the case of foods with a large carbon footprint.
The Rise of Plant-Based Alternatives
Amid a growing market share of plant-based alternatives in markets around the world, the future of the food supply chain could undergo a significant transition.
For investors, this shift is already evident. Beyond Meat, a leading provider of meat substitutes, was one of the best performing stocks of 2019—gaining 202% after its IPO in May 2019.
As rising awareness about the environment becomes more prevalent, is it possible that growing meat consumption could be a thing of the past?
Can We Close the $11 Trillion Climate Investment Gap?
$11 trillion needs to be invested in nature-based solutions between 2022 and 2050 to combat climate change.
Can We Close the $11 Trillion Climate Investment Gap?
Nature-based Solutions (NbS) include actions to preserve or restore natural ecosystems to address social, economic, and environmental challenges effectively, while simultaneously providing benefits to the community.
To achieve its goal of limiting climate change to below 1.5°C by 2050, the UN says that substantial investment in NbS needs to happen. The same investments will also help stop biodiversity loss and deliver land degradation neutrality.
This visualization, sponsored by Carbon Streaming Corporation, explores the investment requirements for various NbS sectors and highlights the critical role of protecting many ecosystems in achieving climate targets.
The Crucial Role of Ecosystem Protection
Terrestrial and marine ecosystems are invaluable when it comes to addressing climate change. They act as natural carbon sinks, effectively absorbing and storing approximately 40% of global carbon emissions.
More specifically, the conservation and restoration of forests, wetlands, grasslands, coastal areas, seagrass, and peatlands is essential to keeping greenhouse gas emissions out of the atmosphere.
But to effectively combat climate change, the estimated cumulative investment required in nature-based solutions between 2022 and 2050 is $11 trillion.
|NbS Investment Area||Cumulative Investment Required 2022-2050 (US$ Trillion)|
|Restoration (Seagrass & Peatlands)||$1.6 Trillion|
|Other Land Management||$1.1 Trillion|
This investment will drive large-scale restoration, conservation efforts, sustainable land-use practices, and ecosystem protection.
A Closer Look at the Investment Gap
Currently, only 17% of NbS investment comes from private sources. However, the annual investment needs to increase fourfold by 2050, which amounts to $520 billion of additional annual NbS investment.
|Year||NbS Investment Required ($B per year)||Increase from 2022|
Collaboration between governments, the private sector, and international organizations is critical to mobilize resources, establish innovative financing mechanisms, and incentivize investments.
Benefits of NbS
Capital allocated to nature-based solutions not only helps combat climate change but also delivers a plethora of other benefits. For example, these solutions promote biodiversity conservation, enhance ecosystem services, support local communities, and foster sustainable development.
Investment in this space is crucial to meeting the UN’s 2050 goals. By financing the creation or expansion of nature-based carbon projects, our sponsor, Carbon Streaming Corporation secures the rights to future carbon credits generated by these projects.
Consumers and businesses can purchase these carbon credits to provide the necessary capital and immediate action needed to effectively combat climate change.
Learn more about Carbon Streaming and how you can get involved now.
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