The World Population
A very important world problem--in fact, I think it may be the most important of all the great world problems which face us at the present time--is rapidly increasing pressure of population on the land.
Suppose we first take a look at the map of the world. The position today is very different from what it was only, shalI we say, 150 or 200 years ago. If we go back to that time, there were large parts of the world which had not then been explored(开发). For example,
The position at the present day is absolutely different. We now know roughly the actual extent of the earth's surface. Even the outline of the Antarctic continent(南极洲) is shown in a solid line on the latest maps. It is only in the last two or three years that we have been able to remove the last doubtful lines, and have settled down to the idea that the earth's land surface is something fixed,and will not extend any more.
But what about population? The population of the world today is about 6000000000. That is an enormous number, yet it is known quite accurately, because there are very few parts of the world which have not carried out a modern census(人口普查).
The important thing is not so much the actual population of the world,but its rate of increase. It works out to be about 1.6 percent annual net increase. In numbers this means something like forty to forty-five million additional people every year.
By this time tomorrow, and every day, there will be added to the earth about 120,000 extra people--just about the population of the city of
This enormous increase of population will create immense problems. By AD. 2020, unless something terrible happens, there will be as many as 7000000000 people on the surface of the earth! So this is a problem which you are going to see in your lifetime.
World Population Day July 11, 2004 2004 marks the 10th anniversary of the groundbreaking International Conference on Population and Development (ICPD) in Cairo, Egypt, in 1994. Ten years ago, on the e...（查看全文）
A:Ben,tell me something about Canada,will ya? Ben,给我将点儿加拿大的事儿吧 B:No problem.But Canada is such a big country.What do you wanna know? 没问题，可加拿大是个大国，你想知道什么呢？ ...（查看全文）
人口增长对野生动物的影响[2.图画/图表描述段] From these graphs, we can draw a conclusion that, with the growth of human population, the number of species has decreased rapidly in America, and some spec...（查看全文）
Traffic and population1. 交通问题已经成为大城市的主要问题之一。2. 快速增长的人，是造成交通问题的原因。3. 应采取措施解决这个问题。 Traffic problems have become one of the major problems in cities. Stre...（查看全文）
Population Control1．科学的进步和生活条件的改善导致了世界人口的迅速增加。2．但是人口过分增长会对人类社会的存在构成威胁。3．为了保证人类社会的稳定发展……。Progress in science and the improvement of li...（查看全文）