Composting is a Jewish Act
What Jewish Tradition Can Teach Us About Waste, Soil, and What We Return to the Earth
This is the first essay in a series exploring Judaism and composting.
Jewish practice surrounds food with attention. We bless before we eat. We give thanks after eating. Our calendar is filled with harvests and first fruits, bread and wine, fasting and feasting. Jewish law asks what we may eat, how food is prepared, what must be shared, what must be left for others, when agricultural land must rest, and even who ultimately owns the land from which our food comes.
But there is a moment in the life of food to which we give remarkably little attention: What happens after we are finished with it?
The meal ends. The plate is cleared. There is an apple core, a banana peel, coffee grounds, eggshells, bones, wilted lettuce, perhaps part of a sandwich that should have been eaten but wasn’t. Something that only moments before was called food crosses an invisible line and acquires a different name: waste.
At precisely that moment, a new set of Jewish questions begins. What are we permitted to waste? What responsibilities accompany abundance? Does owning something give us the right to destroy it? What does it mean to use the earth while also guarding it? What do we owe the soil after taking nourishment from it? And where, exactly, do we imagine all of this material goes when we say we have thrown it “away”?
Judaism has much to say about what we eat, how we eat, what we share, what we leave for others, when we stop working the land, and whom the land ultimately belongs to. It would be strange if our responsibility ended at the garbage can.
Do Not Destroy
One of Judaism’s most important teachings about waste begins in an unexpected place: war.
Deuteronomy describes an army laying siege to a city. Even in that extreme circumstance, the Torah prohibits the needless destruction of fruit trees: lo tashchit—do not destroy.
The original command is specific. It concerns fruit trees during a siege. But Jewish tradition does not leave the principle there. Over time, bal tashchit—the prohibition against needless destruction—develops into a much wider moral and legal principle. Maimonides writes that the prohibition extends beyond cutting down fruit trees to needlessly breaking vessels, tearing clothing, demolishing buildings, stopping up springs, and destroying food.
That is a remarkable expansion. The principle begins in one of the most destructive situations human beings create, and even there Torah introduces a limit: having the power to destroy something does not automatically give us permission to destroy it. Centuries later, Jewish law applies that logic to something as ordinary as wasting food.
That is considerably more demanding than “please recycle.”
Bal tashchit asks us to examine our relationship with usefulness itself. Something does not necessarily become worthless simply because we are finished with it. Ownership does not erase obligation, and convenience is not the same as necessity.
Sefer HaChinukh, the medieval work that explores the purposes behind the commandments, takes the idea inward. It describes bal tashchit as training a person to love what is good and useful and to resist needless destruction. The teaching is therefore not merely about conserving resources. It is also about cultivating a kind of person.
That strikes me as especially relevant in a culture of extraordinary material abundance. We are surrounded by things whose origins are largely invisible to us. Food arrives harvested, washed, packed, transported, refrigerated, stocked and ready to eat. When we are finished, another system carries the remains out of sight. The ease of disposal can make destruction feel morally neutral.
Bal tashchit interrupts that habit. Before discarding something, it asks us to notice what it is, what went into it, whether it still has a use, and whether wasting it is actually necessary.
For food, that question has to come before composting.
I am in love with composting, but composting food waste is a last resort. If food can still nourish someone, let it remain food. Eat it later. Save it. Share it. Cook vegetables before they spoil. Bring the unfinished half of an apple home. Feed appropriate scraps to an animal where that makes sense. Composting should never become permission to waste edible food.
The goal is to waste as little food as possible—and then refuse to waste even the waste.
Eventually, of course, we reach what cannot be eaten: banana peels, avocado pits, bones, eggshells, coffee grounds, or food genuinely spoiled beyond recovery. Then bal tashchit poses another question. Must these remains now become garbage, or do they still have somewhere to go?
To Work It and Guard It
The Torah’s first sustained image of the human relationship with the earth appears near the beginning of Genesis. God places the human being in the Garden of Eden l’ovdah u’l’shomrah—often translated as “to work it and to guard it,” or “to till it and to keep it.”
The pairing matters. The human being is not placed in the garden merely to admire it; we are permitted—even expected—to work the earth, cultivate it, use it, and receive sustenance from it. But use appears alongside protection: to work it and to guard it. Those responsibilities exist in the same sentence.
That is a richer idea than either extreme we often fall into: nature as something human beings must never touch, or nature as raw material placed here entirely for our consumption. Jewish tradition begins with relationship. We use, and we protect. We receive from the earth, and therefore we become responsible for how we treat what sustains us.
Every meal is an act of taking from living systems. The tomato on the plate contains minerals drawn from soil, water pulled upward through roots, energy captured from sunlight, and the labor of innumerable organisms above and below ground. The bread contains the fertility of a field. The apple contains years of life in a tree.
We have to take. Human beings cannot live without taking. The Jewish question is not whether we will use the world, but how we will use it, and whether our use remains joined to an obligation to guard what sustains us.
Composting makes that relationship unusually tangible. We eat. Something remains. Instead of sending those organic remains out of sight to be buried as garbage, we can participate in returning them to a biological process capable of creating something the soil can use again.
There is humility in this. We are not teaching nature how to recycle an apple core. Nature has been decomposing organic matter for hundreds of millions of years. We are simply choosing to cooperate with a process that existed long before us instead of interrupting it.
“The Land Is Mine”
Leviticus makes the question of ownership even more unsettling.
In the laws surrounding the sabbatical and Jubilee cycles, God tells the Israelites: “The land is Mine.”
Human beings may possess land, work it, inherit it, buy rights to it, grow food upon it, and build lives there. Yet Torah places a limit beneath all those arrangements. The land is not ultimately ours.
That idea runs against a powerful modern assumption: I bought it, therefore I can do whatever I want with it. Jewish tradition is more complicated. Possession creates rights, but it does not necessarily create absolute moral authority. If even the land itself is ultimately not ours, then our relationship with everything that comes from it should contain some degree of humility.
Food becomes especially interesting through this lens. We did not create the fundamental materials from which it is made. We participate in their cultivation, transformation, distribution and preparation, but the carbon, water, minerals and biological fertility embodied in food existed before the meal and will continue to exist afterward.
For a brief period, they pass through our hands—and through our bodies.
We might begin to think of ourselves less as the final owners of these materials than as participants in their journey. That changes what “throwing something away” means. If an avocado pit, apple core, coffee ground, or wilted leaf still contains organic matter capable of becoming part of living soil, our personal usefulness is not necessarily the end of its usefulness.
We may be finished with it. The earth may not be.
A Tradition That Knows When to Stop
This limitation on ownership appears elsewhere in Jewish life as a limitation on continuous human activity.
Every seventh day, work stops. Shabbat interrupts production. The Torah takes that pattern further with Shmita: every seventh year, agricultural land is given a Sabbath of its own. The field is not treated simply as a machine whose output must be maximized without interruption.
Jewish time repeatedly places boundaries around the human impulse to keep producing, acquiring, harvesting and taking. There is work and there is cessation; cultivation and rest; ownership and release. The field is harvested, but parts of the harvest belong to others. The land is worked, but not without limit.
Jewish life keeps reminding us that not everything we are capable of taking must therefore be taken.
That does not make Judaism hostile to production or abundance. Quite the opposite. Jewish tradition celebrates harvests, good food, bread, wine, fruit, hospitality and feasting. The question is what abundance asks of us.
Does abundance make us careless because there is always more? Or does abundance increase our obligation to notice what we have been given?
Composting cannot answer that question by itself. But it can become one small, physical practice through which we answer it.
What Looks Dead Is Alive
There is another reason composting belongs in this conversation, and this one is not primarily legal or ethical. It is biological.
Push a long thermometer into the center of an active compost pile and the temperature may climb past 130 degrees Fahrenheit. Nothing has been plugged in. No heater is buried inside. No flame is burning. The heat is metabolism—the activity of enormous communities of microorganisms consuming and transforming organic matter.
Bacteria multiply and shift as conditions change. Fungi help break apart complex materials. Other organisms enter at different stages. The physical remains of plants and animals are dismantled, transformed and incorporated into new biological relationships.
What looks from a distance like a pile of dead things can be astonishingly alive.
I have spent years around compost piles, and I still find this extraordinary. A carrot top, a leaf, coffee grounds, straw, the remains of a meal—materials we casually classify as dead or useless—become food for immense communities of organisms. Their activity creates heat you can feel. Over time, the original materials become increasingly unrecognizable until, given the right conditions and enough time, what emerges is a mature material profoundly different from what went in.
This is decomposition, but decomposition is not merely disappearance. It is transformation.
And that makes one of the most ordinary processes on Earth spiritually arresting. Death and life are not opposites in the simple way we sometimes imagine them to be. In the living world, death feeds life.
The fallen leaf becomes food. The dead plant becomes habitat and nutrient. The remains of one generation participate in creating the conditions for another.
This is not metaphor imposed upon biology. It is biology. The metaphor comes afterward, when human beings notice what the living world has been doing all along.
There is much more to say about Judaism, death, renewal and the strange fertility of decay. That deserves an essay of its own. For now, it is enough to notice that composting places us close to a truth modern life often conceals: things do not simply disappear. They become something else.
From a Jewish Value to a Jewish Practice
This is where composting becomes especially interesting for Jewish institutions.
Consider what passes through a Jewish community every week: preschool snacks, school lunches, synagogue kitchens, Kiddush, Shabbat dinners, holiday celebrations, staff kitchens, summer camps, retreats, meetings and communal meals.
That organic material is not peripheral to Jewish communal life. It is produced by Jewish communal life.
What happens to it afterward is therefore worth considering as part of the institution’s values.
A Jewish institution teaches through more than its curriculum. It teaches through its building, its purchasing, its kitchen, its landscaping, its waste stream, and the thousands of ordinary decisions through which communal life is organized. If students learn bal tashchit in the morning, what happens to their lunch in the afternoon is part of the lesson too.
Imagine a Jewish day school in which students first learn to waste less food. They save what can still be eaten and begin to understand where food comes from and what went into producing it. Then the unavoidable scraps are collected instead of discarded as garbage.
Students can weigh those scraps and see how much organic material their community produces. They can participate appropriately in the composting process, study decomposition and soil microbiology, feel the heat created by microbial activity, watch the material change over time, and eventually hold finished compost in their hands. Then that compost can return to soil—perhaps to a garden, trees, landscaping, or food grown on campus.
Suddenly bal tashchit is not simply a vocabulary word. L’ovdah u’l’shomrah is not merely a verse. The idea that the earth is not simply ours to exhaust is not an abstraction. The physical life of the institution has begun to express what the institution says it believes.
The same possibility exists in synagogues, Jewish community centers, camps, retreat centers and other communal spaces. Each setting will be different, and not every site is appropriate for on-site composting. Proper composting requires the right system, space, knowledge, management and long-term commitment.
But wherever it can be done responsibly, there is a meaningful difference between teaching an environmental value and organizing a piece of communal life around that value.
A classroom worm bin can be wonderful. A small garden pile can be wonderful. Demonstrations have educational value. But an institution producing hundreds or thousands of pounds of organic material can also ask a larger question: What would it look like for the institution itself—not merely the classroom—to practice what it teaches?
At that scale, composting ceases to be only an environmental lesson. It becomes part of operations, culture and communal responsibility.
What a Jewish community does with what remains after the meal is also part of what that community teaches about the meal.
Ancient Questions, Modern Circumstances
There is a temptation in environmental writing to make ancient religious texts sound as though they secretly predicted modern ecological science.
They did not.
The authors of the Torah and the rabbis did not know about synthetic fertilizer, municipal landfills, diesel waste-hauling fleets, atmospheric methane concentrations, industrial agriculture, microplastics, or anthropogenic climate change. We should not pretend they did.
Their contribution is different and, in some ways, more enduring. They left us questions: What may human beings destroy simply because it is convenient? What obligations come with abundance? Does possession give us unlimited rights? How do we work the earth while guarding it? When must production stop? What belongs to us, and what only passes temporarily through our hands?
Those questions were not written for the climate crisis, but the climate crisis makes them newly urgent.
Food waste is one place where ancient ethical questions and modern ecological realities meet with unusual clarity. We now know that when food and other organic material are buried in landfills, their anaerobic decomposition produces methane, a powerful greenhouse gas. We also know that food represents a significant portion of what Americans landfill.
I explore that larger material journey—the extraordinary resources required to grow food, what happens when it enters a landfill, what really happens after we put it into a municipal green bin, and what changes when we compost close to where we live, work and play—in “There Is No ‘Away.’”
Here, the narrower Jewish point is enough: our environmental circumstances have changed dramatically. The questions of responsibility have not.
A Jewish Act
Composting is not a mitzvah named in the Torah. The rabbis did not command Jewish communities to build compost piles, and Maimonides did not write a tractate on carbon-to-nitrogen ratios. To pretend otherwise would diminish both Judaism and composting.
Nor does Judaism have an exclusive claim on the practice. A Christian can compost. A Muslim can compost. A Buddhist can compost. An atheist can compost. The bacteria certainly don’t care.
But a universal practice can acquire particular meaning within a tradition.
Jewish tradition tells us not to destroy needlessly. It places the first human in a garden with the simultaneous responsibilities to work it and guard it. It limits our claim of absolute ownership by declaring that the land ultimately belongs to God. It builds interruption and restraint into our relationship with labor and land. It treats food as something worthy of blessing, gratitude, law and ethical attention.
Composting can give those ideas a remarkably physical expression.
We waste as little food as we can. We let food remain food for as long as it can nourish someone. When something truly can no longer be eaten, we refuse to treat its remaining organic matter as meaningless. We take responsibility for what remains, participate in its transformation rather than pretending it has vanished, and return it to the living world from which our food came.
No one needs to be Jewish to do any of this.
But when a Jewish person or Jewish community does it with an awareness of bal tashchit, of l’ovdah u’l’shomrah, of Shabbat and Shmita, and of the declaration that “the land is Mine,” something more than waste management is taking place.
An ordinary material act becomes a way of inhabiting an ancient set of responsibilities.
And that, too, can be a Jewish act.
Sources
Genesis 2:15 — the human being placed in the Garden of Eden l’ovdah u’l’shomrah, to work/till and guard/keep it.
Deuteronomy 20:19–20 — the biblical source of the prohibition against needless destruction of fruit trees during a siege.
Maimonides, Mishneh Torah, Hilchot Melachim u’Milchamot 6:8–10 — expansion of bal tashchit beyond trees to needless destruction of useful things, including food.
Sefer HaChinukh, Mitzvah 529 — bal tashchit as the cultivation of a character that values what is good and useful and resists needless destruction.
Leviticus 25:1–7 — the sabbatical year, Shmita, and the Sabbath of the land.
Leviticus 25:23 — “The land is Mine,” and the limitation placed on human claims of absolute ownership.
Jewish Farm School, “Composting & Cycles” — Jewish educational material connecting composting, natural cycles, Shabbat, Shmita and renewal.
Jewish Farm School, “Jewish Gardening Workshop” — Jewish agricultural education centered on stewardship, experiential learning and l’ovdah u’l’shomrah.
Hazon, Food for Thought: Hazon’s Sourcebook on Jews, Food & Contemporary Life — Jewish sources and educational framing around food, agriculture, ethics and responsibility.
Pearlstone, Zera’im: Jewish Community Gardening Resource Manual — experiential Jewish agricultural education and Jewish approaches to land, gardening and stewardship.
Hazon, Shmita Sourcebook — contemporary Jewish exploration of Shmita, limits, stewardship, shared abundance and ecological responsibility.
Pesach Stadlin, Bal Tashchit educational sourcebook — classical and contemporary sources examining waste, ownership, destruction and responsibility.
Related essay: There Is No “Away”: What Really Happens to Our Food Waste—and Why Composting It Where We Live, Work, and Play Matters.
