Three million migrants are moving from poor countries to wealthier ones each year, and increasingly, their destination is a neighboring country in developing parts of the world. People are moving within the developing world for the same reasons as they migrate to wealthier nations. People from poor countries are going to less poor countries, fleeing wars and conflicts. They are also responding to population pressures because some countries are densely populated, and they often have high population growth. Those people need to go somewhere else.

　　There are three main reasons why people move. The basic categories and percentages are as follows, according to the Current Population Surveys (CPS):

　　Family-related reasons account for 26.3%, including changes in marital（婚姻的） status, establishing a household and other family reasons; work-related reasons 16.2%, including job transfer, retirement, and other job-related reasons; housing-related reasons 51.6%, including new and better houses, better neighborhood, cheaper housing and other housing reasons; the remaining 5.9% of other reasons are attending college, the change of climate and health reasons.

　　Americans have been migrating south and west for decades in search of better job opportunities and warmer climates. They have also been moving to places a little far from cities, in search of bigger yards and houses, lower crime rates and better schools. In 1950, nearly a fifth of the population lived in the nation’s 20 largest cities. In 2006, it was about one in ten. That’s why many American people say, “Big Cities Shrink as People Move South, West.”

【2017届高考英语二轮专题复习 阅读理解部分之限时训练（七）】相关文章：

★ 【北京专用】2014届高考英语一轮复习方案课时作业：必修3 Unit 2 Healthy eating

★ 2014届高考英语一轮复习课时作业(六)必修1Module 6《The Internet and Telecommunications》（外研版）

★ 【三维设计】2017届高考英语（江苏专用）二轮复习课件：必修3 Unit 2《Language》

★ 【北师大版】2014届高考英语一轮复习指导课时作业：Unit 8 A卷 Word版含解析

★ 2017届高考英语二轮复习课时训练：4（含解析）

★ 2014届高考英语一轮复习课时作业(十八)必修3Module 6《Old and New》（外研版）

★ 【人教版】2014届高考英语一轮复习指导考点针对练：选修6 unit4《Global warming》

★ 【北师大版】2014届高考英语一轮复习指导课时作业：Unit 2 B卷 Word版含解析

★ 四川省2016届高考英语一轮复习课时作业（41） Module 5 Ethnic Culture 外研版选修8

★ 2017届高考英语二轮复习大题冲关秘籍语法填空：解题技巧（含解析）