Можно перефразировать данное задание так Paraphrase: The doctors say that flying is bad for passengers. What are the reasons?
А вот возможный вариант ответа на данный вопрос.
It's a well-known fact that during the flight passengers are followed by decompression, hypoxia, space radiation, dehydration. Besides, modern aircraft allow people to make flights crossing different time zones, it results in insomnia. There is jet lag - the difference between the time you got used to and the new time, people experience tiredness. Also pressure changes can lead to problems with health. So, pilots should look after their health.
detrimental - вредный
больше ответов на вопросы selcal в этом курсе (создан квалифицированным преподавателем по авиационному английскому, лингвистом)
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