"Who are the farmer's servants? ... Geology and Chemistry, the quarry of the air, the water of the brook, the lightning of the cloud, the castings of the worm, the plough of the frost."

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A root, a stem, a leaf, some means of capturing sunlight and air and making food - in sum, a plant. The green substance of this earth, the chlorophyll, is all summed up in the plants. Without them we perish, all of us who are flesh and blood.

— Hal Borland