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المصادر:


https://theconversation.com/how-the-h...


https://www.bbc.com/travel/article/20...


https://web.archive.org/web/201706140...


https://www.fortunebusinessinsights.c...


https://www.nature.com/articles/s4155...


http://www.washingtontimes.com/news/2...


https://www.cambridge.org/eg/universi...


https://academic.oup.com/qje/article/...


https://www.businessinsider.com/10-cr...


http://www.vegetablefacts.net/vegetab...


https://www.sciencedirect.com/topics/...