Plural of carpool; an arrangement where a group of people share a car to travel to the same destination, typically to reduce costs and environmental impact.
From car + pool (a shared resource). Emerged in mid-20th century America during oil shortages and traffic concerns, combining transportation efficiency with resource sharing.
Carpooling exploded during World War II gas rationing and then returned as an eco-friendly superhero—one carpool can remove 4-5 cars from the highway and cut carbon emissions dramatically!
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