1. ageing of population reason 1. one-child policy has been carried out for a long time, so it appears low rate of birth. 2. the development of scientific technology makes people live longer. affect: 1. the burden of old people's medical fare increases as the ages increase 2. social resources are increasing for raising the old. 2. juvenile delinquency reason. 1. bad habits and wrong thoughts 2. bad influence from the social climate affect: 1. makes them lose bright future 2. makes parents sad 3. historical sites destroy reason: 1. people are seeking for modern, so they destroy some parts of ancient buildings. 2. People think it is out of date affects: 1. stop the heritage of historic culture 2. lose some buildings with local historic features
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