The National Academy of Engineering (NAE) and their 14 Grand Challenges go hand-in-hand with our vision to engineer a better world for all humanity. Engineers and computer scientists are challenged to solve these problems in order to improve life on the planet. Learn more about the NAE Grand Challenges at http://engineeringchallenges.org and tell us which challenge is most important to you, and why. * (250 words limit).
Please rewrite the essay and fix any diction mistakes and expressions. And limit the words to 250.
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