Why should we care? what difference does it make if some species are extinguished, if even half of all the species on
earth disappear? let me count the ways. new sources of scientific information will be lost. vast potential biological
wealth will be destroyed. still undeveloped medicines, crops, pharmaceuticals, timber, fibers, pulp, soil-restoring
vegetation, petroleum substitutes, and other products and amenities will never come to light. it is fashionable in some
quarters to wave aside the small and obscure, the bugs and weeds, forgetting that an obscure moth from latin americ
saved australia's pastureland from overgrowth by cactus, that the rosy periwinkle provided the cure for hodgkin's
disease and childhood lymphocytic leukemia, that the bark of the pacific yew offers hope for victims of ovarian and
breast cancer, that a chemical from the saliva of leeches dissolves blood clots during surgery, and so on down a roster
already grown long and illustrious despite the limited research addressed to it.
which techniques does wilson use in this excerpt to convey important information to his readers?
wilson uses humorous anecdotes that make the information more interesting.
wilson uses metaphors that appeal to a wide range of the reader's senses.
wilson relates the significance of the information directly to the reader's life.
wilson refers to empirical statistics to relate the importance of his message.