It has done this because when they have to extend a train track or the road they have to get rid of a forest that is growing just because they want more people to get around and travel. Also they have to do this because imagine of you are just driving through a forest and then a tree is leaning and then it gets in the way of the road when it falls.
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Before the advent of modern transportation, people were limited to food that could be grown locally. Transportation by air, rail, and truck have made food produced in one region available worldwide. The combination of air transportation and refrigeration have made fresh produce available year-round
