9781422274552

WORDS TO UNDERSTAND

bowhead whales large-mouthed Arctic whale

catastrophic extremely harmful

copier electrical machine that makes copies of typed, written, or drawn material

curb to lessen the intensity of something

decompose break down

efficient being effective without wasting time, effort, or expense

endangered in immediate danger of extinction

fertilizer any substance, such as manure, used to increase soil fertility

generator an engine that converts mechanical energy into electrical energy

greenhouse gas a gas that contributes to the greenhouse effect by absorbing infrared radiation

iceberg a large mass of ice floating on sea

kilowatt-hour a unit of energy equal to the power of 1,000 watts operating for one hour

kinetic energy the mechanical energy that a body possesses due to its own motion

landfill a low area where waste is buried between the layers of earth

CLIMATE CHANGE: Problems and Progress

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