aquifer - n. a layer of rock or sand that can absorb and hold water

authority - n. a government organization that has control of a specified activity or area

brine - n. the salty water of the ocean

extract - v. to remove (something) by pulling it out or cutting it out

mobile - adj. able to be moved

reserve - n. an area of land where animals and plants are given special protection

watershed - n. a line of hills or mountains from which rivers drain