Listen to the following dialogue and interpret it as required. After you hear a

A：我不知道你有没有注意到，现在去医院看病的老人比例越来越高，而且很多老人都是自己独自前往看病的，这样的现象还越来越明显了，对于这个问题你怎么看?
B: Yeah, I noticed that. That happens because we are facing an increasingly serious global issue, that is, age population. The aged population is currently at its highest level in human history. The UN predicts that the rate of population aging in the 21st century will exceed that of the previous century. The number of people aged 60 years and over has tripled since 1950, reaching 600 million in the year 2000 and surpassing 700 million in 2006. It is projected that the combined senior and geriatric population will reach 2. 1 billion by the year 2050. Countries vary significantly in terms of the degree and pace of aging, and the UN expects countries that begin aging later will have less time to adapt to its implications.
A：如果全世界都这么严重的话，有没有哪些国家或者地区是尤其严重的?他们的严重程度如何?
B: Asia and Europe are the two regions where a significant number of countries face population aging in the near future. Within twenty years many countries in these regions will face a situation where the largest population cohort will be those over 65 and with an average age of about 50 years old.
A：那么老龄化到底会给我们带来什么影响?
B: An aging population may result in lower interest rates and the economic benefits of lower inflation since the old people tend to spend far less than the young ones. The largest part of expenditure in many countries is now health care, whose cost is likely to increase dramatically as population ages. Social security systems have also begun to experience problems. It is predictable that an aging population will have some negative social impact in a long run.