Source

Adapted from John Muir, Our National Parks (1901, public domain), especially the discussion of how forests regulate water, soil, and climate.

Passage

John Muir argues that a forest should not be judged only by the timber that can be cut from it. To many people, a tree seems useful only when it can be turned into boards, fuel, or money. Muir rejects that narrow view. In his account, a mountain forest is a working system whose value appears in many connected forms. Trees gather sunlight, hold moisture, break the force of storms, and protect the soil from being washed away. Even when no saw touches them, they are busy. Their roots bind loose earth to the slopes, their fallen leaves make a soft covering that stores water, and their shade slows the rapid melting of snow. Because of these quiet actions, streams flow more steadily through the dry season instead of rushing away all at once in flood.

Muir also notices that the benefits of forests travel far beyond the places where the trees stand. A city in a low valley may depend on water that first met a forest high in the mountains. Farmers who never visit the upper slopes may still profit from the way wooded land preserves rich soil and moderates the supply of water. If the forest is destroyed, the loss does not remain local. Rain that once entered the ground runs off quickly. Rivers become muddy and violent after storms, yet smaller and weaker in times of drought. The damage therefore appears twice: once in sudden excess and again in later scarcity.

What makes Muir’s writing effective is that he treats nature as both beautiful and practical. He clearly loves wild landscapes, but he does not defend them only by appealing to emotion. Instead, he shows that forests perform work on which human communities depend, whether those communities notice it or not. This argument broadens the meaning of economy. A forest is not merely a store of lumber waiting to be sold; it is part of a larger exchange among snow, rock, soil, rivers, plants, animals, and people. To understand that exchange is to see that preservation is not the opposite of usefulness. In many cases, preservation is the deeper and more intelligent use.

Vocabulary

Word / Phrase Meaning TOEFL Note
narrow view a limited way of understanding something Often used when an author criticizes a simple explanation.
bind hold firmly together Useful in science passages about roots, molecules, or social ties.
moderate make less extreme Common in environmental and economics texts.
scarcity a condition of not having enough Often contrasts with excess or abundance.
broaden make wider in scope or meaning Good academic verb for describing an expanded argument.
preservation protection from damage or loss Frequently appears in environmental policy passages.

Sentence Work

If the forest is destroyed, the loss does not remain local.

This short sentence carries a large logical shift. Muir moves from the mountain itself to downstream regions and human society. In TOEFL terms, does not remain local signals a cause-and-effect chain: damage in one place spreads through water systems, farming, and settlement patterns. The sentence is compact, but it prepares the reader for the wider consequences developed in the next lines.

A forest is not merely a store of lumber waiting to be sold; it is part of a larger exchange among snow, rock, soil, rivers, plants, animals, and people.

The semicolon joins two definitions of the same object. The first definition is commercial and limited. The second is ecological and systemic. When TOEFL passages use this kind of contrast, the test often asks how the author’s perspective differs from a common assumption.

Structure Notes

The passage starts with a familiar economic assumption and then overturns it. It next explains the hidden physical work forests perform, then traces the downstream effects on water and agriculture. The final paragraph widens the claim into a principle: true usefulness includes long-term ecological function, not only immediate sale value.

Writing Takeaway

This is a strong model for integrated argument. Begin with a common belief, challenge it directly, support the challenge with concrete mechanisms, and then end by redefining the key term in a broader way. That structure is useful in TOEFL writing because it turns description into clear reasoning.