Ⅵ.阅读理解

　　Let us consider what we can do for the food problem.

　　The simple way to increase food production，one might suppose，is to bring more land into farmland and put more people to work on it.

　　But it is proved in some developing countries that this will bring some problems.It will quickly make the soil poorer and destroy forest growth.Furthermore，the people there will always find they need more people to work on this land to produce more food.

　　During the past twenty years，some developing countries have increased a lot more farmland in their countries，but their populations have in the meantime grown faster，therefore，they are further behind than before.And their food increase has been gained at the cost of using up the rich lands.Many of the lands have become poor lands and are producing less food now.

　　Meanwhile，farming in the developed countries has produced much more food through improved technology.Since 1940，farmland has been reduced by 7 percent in the United States but cereal production has jumped by 60 percent.The increase in the corn output，thanks to hybrid corn，has been even greater.

　　The “secret”is to apply fertilizer，in scientific ways，of course.And compared to the developing countries，the populations in developed countries have increased just a little larger than twenty years ago.

　　On the whole，world population today is increasing at the speed higher than ever before.Every year the population is two percent larger，so that the 6,000,000,000 people on the earth today will present another 120,000,000 mouths to be fed by the time next year.It is a fearsome thought that this time tomorrow there will be about 330,000 persons added to this world population.

【2017届高考英语（重庆专用）二轮精练：必修4 unit2 period 1】相关文章：

★ 【浙江专用】2014届高考英语一轮复习课时作业(三十九)选修8Unit 4《Pygmalion》

★ 【北京专用】2014届高考英语一轮复习方案课时作业：选修7 Unit 1 Living well

★ 贵州省贵阳市2014高考英语（新人教版）一轮阅读训练（5）附答案

★ 贵州省贵阳市2014高考英语（新人教版）一轮阅读训练（4）附答案

★ 贵州省贵阳市2014高考英语（新人教版）一轮阅读训练（22）附答案

★ 【人教版】2014届高考英语一轮复习指导考点针对练：必修5 unit5《First aid》

★ 【浙江专用】2014届高考英语一轮复习课时作业(十三)必修3Unit 3《The Million Pound Bank Note》

★ 2014届高考英语一轮复习必修1参考答案（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 unit5《The power of nature》

★ 【人教版】2014届高考英语一轮复习指导考点针对练：选修6 unit3《A healthy life》