9781422284827

WORDS TO UNDERSTAND adrenaline  a substance released into the body when it feels a strong emotion such as excite- ment or fear; it causes the heart to beat faster and provides an energy boost contamination  making something dirty, unusable, or polluted by adding something bad or harmful to it geotechnical a branch of engineering that deals with earth and related materials infrastructure  the facilities and systems—such as roads, bridges, water and power, and schools—that a country, city, or area need in order to function specialty  an area of study that a person focuses on or is an expert in

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