Across Canada, climate change is reshaping what can grow and where it can grow. For Indigenous communities, especially the Haudenosaunee, whose ancestors thrived on biodiverse diets, the disruption of traditional food systems is more than an environmental crisis. It is also a cultural and spiritual rupture. Yet, within this challenge lies hope: reviving a food economy rooted in Indigenous plant foods can heal the land, strengthen communities, and build resilient local economies.
A Rich Legacy: The Haudenosaunee Foodscape
Arthur C. Parker’s classic book, Iroquois Uses of Maize and Other Food Plants, documents the astonishing diversity of Haudenosaunee agriculture. Based on early 20th-century fieldwork in New York, Ontario, and Quebec, Parker recorded not only the range of foods but also the recipes, terminology, and cultural contexts that guided their use.
Maize was at the heart of this foodscape, with numerous varieties used for flour, hominy, and whole kernels. Thirteen types of beans and five varieties of squash were intercropped with corn in the renowned “Three Sisters” system. Melons, cucumbers, and husk tomatoes (also known as ground cherries) were cultivated alongside sunflowers grown for their seeds and oil.
Foraged foods were equally important, supplementing the diet with wild peas, asparagus, mushrooms, puffballs, blueberries, grapes, plums, hickory nuts, and acorns. Arrowhead roots, cattails, and the sap of maple and birch added further diversity, both for sustenance and ceremony.
This mix of cultivated and wild foods represented far more than calories; it was a system of resilience, reciprocity, and respect for the land. By diversifying their food sources, the Haudenosaunee developed economies that could withstand ecological changes while upholding cultural values of responsibility and abundance.
Soil Regeneration
One of the greatest challenges of modern farming is soil degradation. Industrial agriculture often strips soil of nutrients, leaving it fragile and dependent on chemical inputs. The Haudenosaunee “Three Sisters” method offers an alternative. Corn provides a natural trellis for beans, beans fix nitrogen in the soil, and squash shades the ground to retain moisture and suppress weeds. Together they create a self-sustaining, regenerative system.
Restoring such practices could play a key role in regenerating soils that have been depleted by centuries of extractive farming. It serves as a reminder that Indigenous agricultural knowledge has always been about working in harmony with nature rather than against it.
Climate Mitigation
Indigenous agriculture is also a climate solution. Practices such as polycultures, perennial planting, and traditional land stewardship help store carbon, protect biodiversity, and stabilize water systems.
- Deep-rooted plants like wild rice, sunchokes, berry bushes, and sunflowers enrich soil, stabilize riverbanks, and filter toxins from water.
- Polycultures, such as the Three Sisters system, reduce pest infestations, conserve moisture, and thrive in extreme climates. Learn more here.
- Traditional stewardship practices, including controlled burning, wetland restoration, and responsible harvesting, help regulate local climates while protecting wildlife corridors.
Research indicates that Indigenous-managed lands are among Canada’s most effective carbon sinks. As Michael Twigg (2024) explains in his article on Indigenous agriculture, scaling these practices could transform agriculture into a climate-positive force.
Economic Revival
Reintroducing Indigenous plant foods carries enormous economic promise. Crops like heritage beans, heirloom corns, and wild rice already perform well in niche markets, but the potential is far greater. Regional processing facilities, community-owned food businesses, and strengthened distribution networks could create livelihoods while retaining wealth within Indigenous nations.
Across Canada, promising initiatives are already underway:
- Indigenous Agriculture and Food Systems Initiative – A federal program funding infrastructure, training, and food-business development anchored in Indigenous crops.
- Prairie Research Kitchen & Métis Food Security Consortium – A Manitoba partnership developing Indigenous recipes, training students, and supporting community food businesses.
- Farm Credit Canada (FCC) – FCC projects that equitable Indigenous participation in agriculture could add $1.5 billion to Canada’s GDP, quadrupling the current value of Indigenous farm operations. Read more here.
- Untapped Potential – Studies suggest Indigenous-led agriculture could grow Canada’s economy by as much as $27 billion while advancing biodiversity and food sovereignty goals.
- Grassroots projects – Initiatives like Understanding Our Food Systems in Northwestern Ontario support First Nations to design food sovereignty plans rooted in community values.
These examples demonstrate how Indigenous food economies can enhance food security, preserve cultural knowledge, and foster sustainable prosperity for both Indigenous nations and Canada as a whole.
Health Reinvigoration
Literature, such as “Traditional Plant Foods of Canadian Indigenous Peoples: Nutrition, Botany and Use ” (Kuhnlein & Turner, 1991), underscores how traditional diets supported strong health long before colonization. Foods like corn, beans, squash, berries, wild rice, and medicinal plants provided fibre, micronutrients, antioxidants, and lean proteins fueling immune strength and metabolic balance.
The replacement of these foods with heavily processed, calorie-dense alternatives has fueled an epidemic of diabetes, heart disease, and obesity in Indigenous communities. Restoring traditional foods to modern diets could reduce these disparities while revitalizing cultural connections.
Stewardship Over Exploitation
Reviving Indigenous food systems requires Indigenous leadership. Without it, there is a risk of commodification and appropriation cycles that repeat historical harms. Indigenous stewardship ensures cultural protocols, ecological respect, and intergenerational responsibility guide food economies. As BCA Global’s Food as Medicine highlights, Elders, knowledge keepers, and land-based educators are central to passing on stewardship values, ensuring food sovereignty endures.
More Than Farming—Healing
At its heart, revitalizing Indigenous food economies is not only about growing food; it is also about preserving and promoting traditional knowledge and practices. It is about healing.
- Healing the land through biodiversity, soil restoration, and water stewardship.
- Healing people through nutrient-rich ancestral foods that improve health and nourish the spirit.
- Healing relationships by renewing responsibilities between people, plants, and place.
- Healing economies through meaningful work that strengthens sovereignty and stewardship.
This is responsible farming at its best: an economy that not only grows crops but also fosters hope. When we restore the food systems that once sustained us, we also regain balance with the land, with each other, and with future generations.
Blog by Rye Karonhiowanen Barberstock
(Image Credit: Diego Marin, Unsplash)
The post Re-Constituting Indigenous Food Economies: The Promise of Plant-Based Regeneration appeared first on Indigenous Climate Hub.
Re-Constituting Indigenous Food Economies: The Promise of Plant-Based Regeneration
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The planet is heating up more quickly than ever before.
For decades, greenhouse gas emissions caused by human activity have been building up in the atmosphere and trapping ever-higher levels of heat.
The resulting asymmetry between incoming solar energy and energy radiated back out into space – known as “Earth’s energy imbalance” – provides a direct measure of the extent to which humans are disrupting the Earth’s climate system.
This imbalance is growing and in 2025 its 10-year average reached a record high, indicating that global temperatures could increase at even higher rates in the future.
This is among the headline findings of the latest “indicators of global climate change” (IGCC) report, published in the journal Earth System Science Data, which tracks changes in the climate system on an annual basis.
The report, now in its fourth iteration, has been produced by dozens of scientists from around the world.
Its findings are designed to fill the gap between Intergovernmental Panel on Climate Change (IPCC) science reports, which are published every 5-7 years.
In this article, we unpack the IGCC report, which explores how human activity is driving a growing energy imbalance and why monitoring systems to track global climate are so crucial.
(For more on previous IGCC reports, see Carbon Brief’s coverage in 2023, 2024 and 2025.)
Greenhouse gas emissions remain at an all-time high
Global greenhouse gas emissions are continuing to increase, mostly as a result of the use of fossil fuels. However, deforestation, agriculture and industrial processes also play an important role.
Over the most recent decade (2015-24), emissions stood at the equivalent of 54.6bn tonnes of carbon dioxide equivalent (GtCO2e) per year. In 2024, the most recent year for which we have complete data, emissions reached 56.8GtCO2e.
As the chart below shows, these emissions have pushed up atmospheric levels of CO2, methane and nitrous oxide. In 2025, concentrations of these gases reached 425.6 parts per million (ppm), 1936.3 parts per billion (ppb) and 339.4ppb, respectively.
This represents a rise of 3.8%, 3.8% and 2.2%, respectively, since the 2019 levels reported in the IPCC’s sixth assessment report (AR6).
At the same time, declines in emissions of aerosols such as sulphur dioxide, partly as a result of efforts to tackle air pollution, are increasing the Earth’s energy imbalance. This is because aerosols have a cooling effect on the Earth’s climate, counteracting warming from CO2 and other greenhouse gas emissions.
(Tackling sulphur dioxide, alongside other particulate emissions, remains critical because the immediate health and environmental damage they cause far outweighs their short-term cooling effect on the climate.)
The Earth’s energy imbalance is rising rapidly
The Earth’s energy imbalance has long been recognised as a key indicator of how the climate is being affected by human activities.
However, it is only in the last few decades that scientists have been able to record temperature changes deep enough in the ocean to accurately quantify it.
Earth’s energy imbalance measures how quickly excess heat is accumulating in every part of the Earth system, primarily in the ocean, but also in land, ice and atmosphere.
Through this accumulation of heat, the energy imbalance influences the rate of sea level rise and ice melt across the world, as well as increasing the frequency and intensity of extreme weather events, such as storms, floods and droughts.
Without human influence, the Earth’s energy imbalance would be close to zero.
But, as greenhouse gas emissions have built up in the atmosphere, the imbalance has been growing since the 1970s. Recent increases to Earth’s energy imbalance have outpaced those projections made by climate models — indicating the planet could see more warming than expected in the future.
As the right-hand chart below shows, the imbalance is now at a record high, having more than doubled over the past two decades.
It has increased by around 40% since 2019, from an average 0.79 watts per square metre (Wm2) over 2006-18, according to IPCC AR6, to 1.12Wm2 over 2013-25.
The left-hand chart shows how heat is accumulating in the ocean (blues), ice (grey), land (orange) and atmosphere (purple).
Global temperature rise
The excess heat building up in the climate system from the energy imbalance is pushing up global temperatures at a record rate of 0.27C per decade.
We estimate that human-induced warming – the amount of observed global surface
temperature increase attributable to both the direct and indirect effects of human activities – reached 1.37C in 2025. This has risen from 1.0C in 2017, as reported in IPCC AR6.
While natural variability in the climate system – such as El Niño or La Niña events – can also influence temperatures year-to-year, the upward temperature trend we are seeing is being driven by the persistent imbalance in energy.
We now expect global temperatures to exceed the Paris Agreement limit of 1.5C above pre-industrial levels around the year 2030.
This is significant because 1.5C has been identified as the critical dividing line between manageable climate risks and catastrophic, potentially irreversible damage to global ecosystems and human societies.
Heat accumulating throughout the Earth system
While heat is accumulating throughout the Earth system, it is not being distributed evenly around the globe.
Since the 1970s, around 90% of this heat has been taken up by the ocean, affecting marine ecosystems, ocean circulation patterns, sea level rise and climate extremes.
For example, the number of marine heatwave days – periods of unusually high sea surface temperatures – has more than tripled globally since the early 1990s. The year 2025 alone saw 65 days of marine heatwaves – meaning they occurred, on average, more than one day a week.
Meanwhile, the cryosphere – the portion of the Earth made up of frozen water, including glaciers, ice sheets and permafrost – is experiencing widespread ice loss and thawing in response to the growing energy imbalance. This affects ecosystems, sea level rise and infrastructure in polar and high-latitude regions.
Rapid warming has also resulted in record extreme temperatures over land, with average maximum temperatures for any single day over 2016-25 around 1.92C above pre-industrial levels). This is an increase of almost half a degree compared to the previous decade (2006-15).
Sea level rise and the energy imbalance
Sea level rise provides one of the clearest long-term signals of a changing planet.
It is closely linked to Earth’s energy imbalance. As heat accumulates in the ocean, water expands, raising sea levels. Meanwhile, a warming land and atmosphere means addition of water to the oceans through melting of glaciers and ice sheets, also adding to sea level rise.
Over the long-term, sea levels have been rising, on average, at a rate of around 1.8mm per year since 1901, totalling a record 23cm in 2025. This is increasing the risk of coastal flooding, erosion and habitat loss in many low-lying areas around the world.
This rise can be seen in the left-hand chart below, which shows observed global sea level changes from tide gauges (grey and blue dashed lines) and satellites (red dashed lines) since 1901. The solid lines indicate the average across multiple datasets.
Sea level rise is accelerating consistent with the observed increase in Earth’s energy imbalance. Over 2006-25, sea levels have risen at a rate of 3.67mm per year – more than double the rate of 1.69mm per year seen over 1976-95.
This increasing rate is shown in the right-hand figure below, which shows four successive overlapping 20-year periods and the most-recent decade.
(Last year’s transition from El Niño to weak La Niña conditions affected global rainfall patterns and led to a small and temporary fall in global average sea level in 2025. This explains the slight decrease in rate of sea level rise for the most recent decade, which is affected more than the 20-year period 2006-25.)
The bigger picture
Despite greenhouse gas emissions not increasing as rapidly as in the 2000s, this year’s IGCC findings continue to show how far and how fast the climate is changing due to human activity.
A significant increase in decarbonisation efforts in the second half of this decade is required to slow down the rate of human-caused warming and limit the escalation of climate risks and impacts.
These findings, like many others produced by scientists across the globe, rely on international expertise, partnership and the maintenance and availability of global climate datasets and the global observing programmes that underpin them.
This year’s edition of IGCC used more than 40 global datasets produced by research teams around the world, including the NASA satellite record of the Earth’s energy imbalance and the ARGO deep ocean float network.
However, a number of long-term monitoring programmes could be threatened by funding decisions made by governments around the world, most notably the Trump administration in the US.
Local meteorological data and weather balloon measurement programmes in many countries have declined in recent years, especially in Africa, the west Pacific and South America. This reduces scientists’ ability to monitor and understand key indicators of climate change.
This is not just an issue for climate science. Many of these observations are key to weather forecasts and systems that provide early warning for extreme weather. For example, media reports have suggested that recent reductions in weather balloon measurements in Alaska led to a lack of warnings for a recent winter storm.
The continuity and integrity of the climate observations that scientists use to understand how the climate is changing depends on effective and sustained coordination by international organisations, such as the Global Climate Observing System, the World Meteorological Organization and World Climate Research Programme.
Without this data and its coordination, future assessments will be much more difficult at a time when urgent climate action is needed.
The post Guest post: How a record-high ‘energy imbalance’ is driving global warming appeared first on Carbon Brief.
Guest post: How a record-high ‘energy imbalance’ is driving global warming
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