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global – adj. involving the entire world
scale – n. the size or level of something especially in comparison to something else
disrupt – v. to cause (something) to be unable to continue in the normal way
unparalleled – adj. never seen or experienced before
prolong – v. to make (something) last or continue for a longer time
introduce – v. to present (something) for discussion or consideration
cherish – v. to treat with affection and tenderness; hold dear.
challenge – n. a difficult task or problem; something that is hard to do
