alternative energy - energy made from a reneawable resource that creates little or no pollution, assembly line - machines, equipment, and workers assembled in a direct line to make a product, automation - making a device or system operate by itself, discrimination - treating a person or a group unfairly, drainage - a system used to remove water or liquid waste,  expedition - a journey or trip for a specific purpose, invasive - tending to spread, irrigation - the use of canals, ditches, and pipes to bring water to dry land, prairie - a large area of rolling grassland, reservation - an area of public land set aside for certain purpose,

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