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monoculture the use of land for growing only one type of crop

pasture grass or other plants for feeding livestock

pesticide a chemical preparation for destroying plant pests

plantation a group of planted trees or plants

progressively change happening in stages

ranching an establishment maintained for raising livestock

sanitation protecting health, cleanliness

scarcity insufficiency of supply

shielding a person or a thing that protects

starvation the state of hunger

sustainable able to be maintained at a certain rate or level

timber wood prepared for use in building and carpentry

topsoil the upper part of the soil

vegetation all the plants of an area taken as a whole

The Vital Role of Deserts and Forests

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