求英语作文关于人口问题!记得要有名字哦

Question

求英语作文关于人口问题!记得要有名字哦

Answer 1

Population and environmental issues is closely inter-causal links,to a certain stage of social development,and productivity of a certain level of geographical conditions,the population should be maintained at an appropriate proportion of proliferation within.
The rapid growth in world population caused many problems.In particular,some over-population,economic growth in developed countries,affecting the country's economic development,social stability and people's living standards,many of the problems to human life.World population problems
In order to solve the problem of excessive population growth,the human must control their own,so that planned fertility,the population growth and socio-economic development compatible with the environment,resource coordination.
In the 1970s,it was considered to account for the population at that time had lived on earth for 75% of the total population.The widely quoted statistics are too affected by the impact of the 20th century population explosion - the proportion of it is incredibly high.To get a more accurate result,we must determine when modern humans from the beginning,the birth rate is the number,and the history of how many people lived in the end.Generally believe that modern man is in the 50,000 years ago.We can imagine,does not limit the population was born,and life expectancy is very short,which resulted in a young population and higher fertility rates - every mother's health at around six to eight children.To the Middle Ages,the birth rate began to decline long.The record shows that since the 18th century,when the industrialized countries,the birth rate continues to decline.U.S.demographers Carl - Hao Po (CarlHaub) that,before the advent of agriculture,hunting in the way,the world's population is only about 5 million to 10 million.Light of the message,to the 1st century AD,according to the Roman,Chinese and Mediterranean off the census,the world's population has grown to 300 million.Application of this population a higher birth rate,we can estimate that so far a total of life on Earth over approximately 106 billion people.We now have 6.1 billion people,accounting for life on Earth has had a total population of 5.7%.In 1900,only 16 million people around the world,but developing countries rapid population growth led to the proliferation of the world's population,so we had a population proportion of the population of the Earth on the rise.