A limp celery stalk, a banana peel or yesterday’s rice hardly looks like a climate problem. Once those scraps disappear into the kitchen trash, most of us stop thinking about them. Yet food does not disappear when it leaves the kitchen: it enters a waste management system, and if that system ends in a landfill, the climate consequences can be surprisingly significant.
That may seem far removed from El Niño, but the connection is worth examining carefully. Food waste does not cause El Niño, and composting cannot control it. El Niño is a natural Pacific Ocean-atmosphere cycle. The connection is broader: a powerful El Niño shows how vulnerable food, water and soil systems can become when natural climate variability operates on top of a warmer global climate, while food waste is one example of an avoidable emissions source we can actually influence.
El Niño 2026 is becoming a serious climate story
By August 2026, El Niño was already established and strengthening across the tropical Pacific. NOAA’s Climate Prediction Center now gives a greater than 90% chance that the event becomes “very strong” during Northern Hemisphere fall and winter 2026–27. For October through December, NOAA also gives a 69% chance that the Relative Oceanic Niño Index, or RONI, reaches +2.5°C or higher, a level NOAA says could exceed previous El Niño events in its record dating back to 1950. The latest official discussion is available from NOAA Climate Prediction Center.
The forecast has revived headlines about a possible “super El Niño,” although that is not an official NOAA category. NOAA classifies El Niño events as weak, moderate, strong or very strong. The important point is not the nickname but the scale of the event now being forecast.
Figure 1. August 2026 El Niño forecast summary. The embedded figure summarizes NOAA CPC probabilities and NOAA GFDL experimental guidance; the original NOAA forecast page and model figure are linked below.
Source: NOAA GFDL – August 2026 El Niño Predictions
NOAA describes ENSO, the El Niño-Southern Oscillation, as one of the most influential sources of year-to-year climate variability on Earth. Changes in tropical Pacific sea-surface temperatures alter rainfall, winds and atmospheric circulation well beyond the Pacific itself. A strong El Niño can shift the Pacific jet stream and increase winter storm activity across California and parts of the southern United States, while other regions, including Australia, Indonesia and parts of southern Asia, can face greater drought risk. NOAA’s plain-language explainer is available at Understanding El Niño.
The effects are not uniform, and El Niño should not be blamed for every flood, drought, heatwave or hurricane that occurs during an El Niño year. What it does is change the probability of particular weather patterns and extremes. In the Atlantic, for example, El Niño typically increases vertical wind shear, which tends to suppress hurricane activity, while parts of the central and eastern Pacific can become more favorable for tropical cyclones.
When a climate pattern becomes an economic problem
The importance of El Niño becomes clearer when the climate signal reaches agriculture and infrastructure. A displaced storm track can mean saturated farmland, erosion and delayed harvests; reduced rainfall can mean depleted reservoirs, irrigation restrictions and crop stress; abnormal heat can affect livestock, electricity demand and public health. Those effects do not stop at the farm gate. They move through commodity markets, insurance systems, transportation networks and household food prices.
A 2023 study in Nature Communications estimated that the economic effects of major El Niño events can persist for years. Under the authors’ statistical framework, the 1997–98 event was associated with roughly $2.1 trillion in cumulative global economic losses, while the 2015–16 event was associated with about $3.9 trillion over the event year and the following three years. Those are modeled estimates rather than a direct tally of disaster losses, but they illustrate why ENSO belongs in conversations about food security, water management and economic resilience. Read the study.
Climate change adds another layer. El Niño itself is natural; human greenhouse gas emissions did not create ENSO. At the same time, the IPCC assesses that ENSO will remain a dominant source of interannual climate variability in a warmer world and that ENSO-related rainfall variability is likely to intensify as the climate warms. Natural variability and human-caused warming are therefore different processes, but they increasingly operate together. IPCC AR6 Working Group I, Chapter 4 provides the broader assessment.
That leaves society with two parallel tasks: adapting to climate extremes and reducing avoidable greenhouse gas emissions. Food waste belongs in the second category.
Food waste is also a methane problem
In the United States, food waste accounts for roughly 24% of municipal solid waste disposed of in landfills, yet EPA estimates that landfilled food is responsible for approximately 58% of fugitive methane emissions from U.S. municipal solid waste landfills. The imbalance is partly explained by the speed at which food decomposes. Once buried in oxygen-poor landfill conditions, organic matter undergoes anaerobic decomposition and generates methane. Food can begin producing methane before landfill-gas collection systems are operating at full effectiveness, and EPA estimates that about 61% of methane generated by landfilled food waste is not captured.
Figure 2. Food waste is disproportionately important to landfill methane. The embedded visualization summarizes EPA’s national estimate; the original EPA landfill-methane graphic and report are linked below.
Source: U.S. EPA – Quantifying Methane Emissions from Landfilled Food Waste
Methane matters particularly in the near term because it traps substantially more heat than carbon dioxide over a 20-year time horizon. This does not mean that one discarded meal meaningfully changes the climate on its own. It means that millions of tons of rapidly decomposing organic material entering landfills create a large, avoidable methane source. The practical question is therefore not simply how much smaller we can make food waste, but where the material ultimately goes.
The “electric composter” category has a definition problem
The household food waste appliance market has made this issue more confusing by grouping very different technologies under labels such as “electric composter.” Some appliances maintain an aerobic biological environment in which microorganisms actively decompose organic material. Others rely primarily on heat, grinding and dehydration to remove water and reduce the weight and volume of scraps. Both approaches can solve practical household problems, but they are not the same biological process and should not automatically be treated as environmentally equivalent.
EPA defines composting as managed, aerobic biological decomposition of organic materials by microorganisms. It separately explains that residential grinding and dehydrating appliances reduce the weight and volume of food scraps but do not produce compost. Their output remains a dried food material that needs further composting, curing or another appropriate downstream treatment. EPA’s Composting at Home guidance makes that distinction explicit.
That does not make dehydration useless. Removing water can reduce storage volume, odor and transportation weight, which may be valuable in certain settings. The limitation is that physical reduction alone does not demonstrate landfill diversion. If dried food scraps ultimately go into general trash and then to landfill, the material may be smaller and lighter, but the waste pathway has not necessarily changed in a way that creates a climate benefit.
Climate performance depends on the whole system
A credible comparison between food waste management technologies has to account for more than the appearance of the final material. Electricity use, manufacturing, transportation, process emissions and the ultimate destination of the output can all affect the result. Thermal dehydration consumes energy to evaporate water, managed composting can also use electricity or fuel, and poorly aerated compost can generate methane or nitrous oxide. None of these factors automatically disqualifies a technology, but they show why a product cannot be judged simply by the word “composter” on its packaging.
A review and meta-analysis of 82 studies, mostly life-cycle assessments, published in Waste Management, found sufficient comparative evidence to conclude that aerobic composting and anaerobic digestion performed better than waste-to-energy and landfill-gas-to-energy for climate-change impacts in the studies reviewed. At the same time, the authors emphasized large differences in system boundaries and found that no single treatment option performed best across every environmental category. The study is indexed at PubMed.
That kind of nuance is not a weakness in environmental analysis; it is precisely what makes lifecycle claims credible.
What composting adds is a soil pathway
Avoiding landfill methane is only one part of the value of composting. The other is what happens when properly processed organic matter returns to land. EPA’s recent scientific review concludes that the research literature broadly supports compost application as a way to improve soil health. Documented benefits include higher organic matter, improved water infiltration and retention, lower soil compaction, reduced erosion and greater resilience to drought and heavy rainfall.
Figure 3. Composting as climate mitigation and soil resilience. The embedded summary reflects findings synthesized by EPA; the original EPA “Benefits of Applying Compost” graphic and report are linked below.
Source: U.S. EPA – Environmental Value of Applying Compost
EPA’s synthesis also estimates an approximately 78% reduction in greenhouse-gas emissions when food waste is composted and land applied rather than landfilled, together with more than three times greater carbon sequestration in the same pathway comparison. Those figures require an important qualification: they describe a waste management pathway comparison across studies reviewed by EPA; they are not a universal carbon-reduction factor that can be attached to any compost pile, municipal program or household appliance.
The broader mechanism is nevertheless important. Properly managed composting can contribute to climate mitigation by reducing exposure to landfill methane, while appropriate compost use can improve the ability of soils to manage both water scarcity and heavy rainfall.
Household technology is beginning to reflect the distinction
The difference between dehydration and biological processing is also beginning to appear in consumer technology. At IFA 2024 in Berlin, Digital Trends included GEME Terra II among its selections for the show’s best smart-home technologies, noting its sensor-based management of the composting environment. GEME also appeared at ShowStoppers @ CES 2025, where the official exhibitor listing categorized the system under GreenTech, Smart Home and Home Appliances; TWICE later included the composter in its ShowStoppers CES coverage. Digital Trends – IFA 2024 coverage, ShowStoppers @ CES 2025 listing, and TWICE – ShowStoppers CES 2025 provide the third-party context.
In 2026, Digital Trends later conducted a multiweek household test of the newer Terra 2 and explicitly distinguished its microbial-decomposition approach from food recyclers that primarily dry and grind scraps. Terra 2 is one example of a newer class of powered household systems designed to maintain an aerobic microbial environment rather than relying mainly on dehydration. That distinction does not exempt it, or any other appliance, from lifecycle scrutiny; the same questions still apply about process, energy use, output destination and the conventional waste pathway actually displaced. Read the Digital Trends review.
What this has to do with El Niño
Composting cannot weaken El Niño, prevent La Niña or change the trade winds over the Pacific. Any claim suggesting that a household waste system can directly influence the strength of ENSO would go far beyond the evidence. The relationship is instead one of climate mitigation and resilience: a very strong El Niño reminds us how quickly natural climate variability can place stress on agriculture, water supplies, soils and infrastructure, while human-caused warming raises the background climate on which that variability operates.
Keeping suitable organic material out of methane-intensive landfill pathways is one way to reduce avoidable emissions. Returning appropriate compost to soil can also improve water retention, infiltration and organic matter, which can help farms and landscapes cope with climate stress. Neither action controls ENSO; both address vulnerabilities that matter in a world where natural climate variability and long-term warming increasingly overlap. For a source-by-source explainer focused specifically on the 2026 forecast and the food-waste connection, see GEME’s Climate Hub article, El Niño 2026 Is a Climate Stress Test: Why Food Waste Matters.
Clear definitions matter more than green labels
Climate discussions naturally focus on large systems such as power generation, transportation, buildings and industry. They should, but smaller material flows still matter, particularly when they occur at the scale of millions of households. Food required land, water, fertilizer, refrigeration, transportation and labor before reaching the kitchen, which is why preventing edible food waste should always come before deciding how to process the remainder.
Once unavoidable scraps remain, the relevant questions are straightforward: what process actually occurred, where did the material go afterward, was landfill disposal genuinely avoided, was something useful returned to soil, and what energy and transportation were required along the way? Dehydrators, food recyclers and composters can all serve useful roles in household food waste management, but they solve different problems and should not be treated as environmentally interchangeable.
The environmental distinction is therefore not simply what a machine is called. It is what process occurred and where the material ultimately went. We cannot control the Pacific Ocean, but we can make better decisions about the food we waste and the systems we use to handle it.
About the Author
Matthew Moore writes about food waste, composting, soil resilience and household environmental technology for GEME, a developer of automated microbial composting systems. His work focuses on biological waste treatment, climate resilience and evidence-based environmental communication.
Disclosure
GEME Terra 2 is referenced briefly as one example of household microbial composting technology. Claims concerning El Niño, methane, composting and climate impacts in this article are based on independent NOAA, EPA, IPCC and peer-reviewed sources. The pathway-level climate findings cited above should not be interpreted as a product-specific lifecycle assessment of GEME Terra 2.
