环境卫生 - World Health Organization (WHO)
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世界上约有13亿人口是青少年，其定义为年龄在10至19岁之间的人群。青少年面临着长期的健康风险暴露及其后果，但往往最难以改变所处的环境，为自身健康福祉做出决策。
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