城市也往往促进不健康的生活方式，例如依赖于富含脂肪和糖但缺少必要营养素的加工食品的廉价和方便饮食。

Cities also tend to promote unhealthy lifestyles, like cheap and convenient diets that depend on processed foods rich in fats and sugar, yet low in essential nutrients.

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加工食品和方便食品常常带来皮肤问题，因其含有大量糖、盐、饱和脂肪、色素、防腐剂和调味剂。

Processed and convenience foods often cause skin problems because of the amounts of sugar, salt, saturated fats, colourings, preservatives and flavourings that they contain.

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