글의 흐름으로 보아, 주어진 문장이 들어가기에 가장 적절한 것은?How… | [법원직 9급 영어] 16년 1회차 기출문제 상세 페이지

글의 흐름으로 보아, 주어진 문장이 들어가기에 가장 적절한 것은?
However, elevated levels and/or long term exposure to air pollution can lead to more serious symptoms and conditions affecting human health.

A variety of air pollutants have known or suspected harmful effects on human health and the environment. In most areas of Europe, these pollutants are principally the products of combustion from space heating, power generation or from motor vehicle traffic. ㉠ Pollutants from these sources may not only prove a problem in the immediate vicinity of these sources but can travel long distances. ㉡ Generally if you are young and in a good state of health, moderate air pollution levels are unlikely to have any serious short term effects. ㉢ This mainly affects the respiratory and inflammatory systems, but can also lead to more serious conditions such as heart disease and cancer. ㉣ People with lung or heart conditions may be more susceptible to the effects of air pollution.

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