Judaism and the Environment: From Bal Tashchit to Climate Action

The Garden and the Gardener

The Torah’s origin story places the first human being in a garden. Not a house, not a city, not a temple — a garden. And the instruction given to that first person is not to pray, study, or worship. It is to tend and keep the garden (Genesis 2:15): l’ovdah u-l’shomrah — to work it and to guard it.

This image — humanity placed in nature with the dual mandate to use and protect — sits at the foundation of Jewish environmental thought. The earth is not ours to exploit without limit. It is ours to tend, and the tending comes with responsibilities.

Jewish tradition develops this idea through law, narrative, ritual, and practice. The result is an environmental ethic that predates the modern ecological movement by millennia — and that speaks to the climate crisis with surprising directness.

Bal Tashchit: Do Not Destroy

The most explicit environmental commandment in the Torah appears in an unexpected context: the laws of warfare.

“When you besiege a city for a long time, making war against it to take it, you shall not destroy its trees by wielding an axe against them. You may eat from them, but you shall not cut them down. Are the trees of the field human, that they should be besieged by you?” (Deuteronomy 20:19-20)

Even in the extremity of war — where nearly everything is permitted — you may not destroy fruit trees. The logic is striking: trees are innocent bystanders. They feed people regardless of which army wins. Destroying them is senseless waste.

The rabbis took this specific prohibition and expanded it into a broad principle: bal tashchit — do not destroy. The Talmud applies it far beyond trees:

• Do not waste food. Throwing away edible food violates bal tashchit.
• Do not destroy usable clothing or household goods.
• Do not waste fuel or energy needlessly.
• Do not divert or pollute water sources.
• Do not destroy anything useful without purpose.

Maimonides codified bal tashchit as extending to anyone who “breaks vessels, tears garments, demolishes a building, stops up a spring, or wastes food” (Mishneh Torah, Laws of Kings 6:10). The principle is clear: the physical world has value, and destroying it without cause is a violation of divine law.

Shemitah: The Land’s Sabbath

Just as people rest on Shabbat, the land rests during Shemitah. Every seventh year, the Torah commands that agricultural land in Israel must lie fallow:

“Six years you shall sow your land and gather in its produce, but the seventh year you shall let it rest and lie still” (Exodus 23:10-11).

During Shemitah:

• Fields are not plowed, sown, or harvested commercially
• Whatever grows naturally belongs to everyone — the poor, strangers, even animals
• Agricultural debts are released

The environmental implications are profound. Shemitah recognizes that the earth is not an infinite resource to be exploited continuously. It needs rest. It needs time to recover its fertility, to regenerate, to be itself without human intervention.

Modern sustainable agriculture has confirmed what the Torah intuited: continuous cultivation depletes soil. Fallow periods allow nutrients to replenish, prevent erosion, and break pest cycles. Shemitah is, in effect, the world’s oldest legislated conservation practice.

The most recent Shemitah year was 2021-2022. In Israel, observance involves complex legal arrangements (heter mechirah — a temporary “sale” of land to non-Jews, disputed by some authorities) that allow the agricultural economy to function while honoring the commandment’s spirit.

Stewardship, Not Ownership

A key concept in Jewish environmental thought is that humanity does not own the earth. “The earth is the Lord’s, and all that fills it” (Psalm 24:1). Human beings are tenants, stewards, caretakers — never owners.

This distinction matters. An owner can do whatever they want with their property. A steward must manage it responsibly, preserving it for its true owner. The rabbinic teaching that “the earth is the Lord’s” means that every environmental decision is, in some sense, a religious one — you are managing God’s property.

The Midrash sharpens this with a parable: When God created Adam, He took him on a tour of the Garden of Eden. “See how beautiful and excellent are My works,” God said. “All that I have created, I created for you. Be mindful not to spoil and destroy My world, for if you spoil it, there is no one after you to repair it” (Ecclesiastes Rabbah 7:13).

Tu BiShvat: From Tax Day to Earth Day

Tu BiShvat, the fifteenth of Shevat, began as a legal date — the “new year of the trees” for purposes of agricultural tithing. For most of Jewish history, it was a minor observance.

In the 1960s and 1970s, as the environmental movement gained momentum, American Jews rediscovered Tu BiShvat as a vehicle for ecological consciousness. Today, Tu BiShvat has been reimagined as a Jewish Earth Day:

• Tu BiShvat seders — modeled on the Passover seder — incorporate readings about environmental responsibility, tastings of fruits and nuts, and discussions of ecological theology.
• Tree-planting campaigns connect to reforestation efforts in Israel and worldwide.
• Environmental education programs in Jewish schools use Tu BiShvat as a springboard for discussing climate change, biodiversity, and sustainability.

The kabbalists of sixteenth-century Safed created the original Tu BiShvat seder, complete with four cups of wine (white to red, mirroring the seasons) and fruits representing different levels of spiritual reality. Modern environmentalists have repurposed this mystical framework for ecological ends — a beautiful example of tradition renewing itself.

Eco-Judaism and Climate Activism

The contemporary Jewish environmental movement draws on all these sources — bal tashchit, Shemitah, stewardship theology, Tu BiShvat — to address the climate crisis.

Organizations like Hazon (now merged with the Pearlstone Center) have pioneered Jewish environmental activism, connecting food justice, sustainable agriculture, and climate advocacy to Jewish values. Dayenu: A Jewish Call to Climate Action explicitly frames climate activism as a religious obligation, arguing that the climate crisis is a pikuach nefesh (life-saving) issue that demands urgent response.

Jewish institutional responses include:

• Synagogues installing solar panels and pursuing green building certifications
• Jewish community farms practicing sustainable agriculture
• Rabbinical statements on climate change from Orthodox, Conservative, Reform, and Reconstructionist leadership
• Integration of environmental themes into Shabbat sermons, holiday observances, and educational curricula

The argument is straightforward: if bal tashchit prohibits wastefully cutting down a single fruit tree, how much more does it prohibit destabilizing the entire climate system? If Shemitah teaches that the land needs rest, what does it say about an economic system that treats the earth as an inexhaustible resource?

The Urgency of Ancient Wisdom

Jewish environmental ethics are not a modern invention grafted onto an ancient tradition. They are woven into the tradition’s oldest and most foundational texts. The first human task was to tend the garden. The first prohibition against environmental destruction was given during the Torah’s discussion of warfare. The first conservation law — Shemitah — was legislated at Sinai.

What has changed is the scale. The environmental challenges of the ancient world were local — a polluted well, a depleted field, a deforested hillside. The environmental challenges of the twenty-first century are global. But the principles remain: the earth is not ours. Destruction without purpose is sin. And the mandate to tend and guard the garden has never been more urgent.