To feed so many people may require expanding farmland at the expense of forests and wilderness，or finding ways to completely increase crop output.

　　Gertjan Meeuws has taken the concept of a greenhouse a step further，growing vegetables and house plants in enclosed (封闭的)and regulated environments.In their research station，water flows into the pans when needed，and the temperature is kept constant.Lights go on and off，creating similar day and night，but according to the rhythm of the plant.

　　A building of 100 square meters and 14 layers(层)of plants could provide a daily diet of 200 grams of fresh fruit and vegetables to the entire population of Den Bosch，about 140,000 people.Their idea isn't to grow foods that require much space，like corn or potatoes.

　　Here sunlight is not only unnecessary but can be harmful.Plants need only specific wavelengths of light to grow.Their growth rate is three times faster than under greenhouse conditions. They use about 90 percent less water than outdoors agriculture.And city farming means producing food near the consumer，and there's no need to transport it long distances.

　　【语篇解读】　本文是一篇说明文，本文主要讲述了研究者Gertjan Meeuws和他的几位同事所研究的一种未来农业模式：不需要阳光和下雨的室内农业，它不同于温室农业，是一种节能、节水和环保的农业方式，具有适应性强，成本低等特色。

【2017届高考英语一轮复习课时知能训练：人教版必修五 Unit 5《First aid》】相关文章：

★ 2017届高考英语二轮复习课时训练：23（含解析）

★ 2014年牛津译林版高中英语总复习（第1轮）同步练习 M4《Unit 2 Sports events》

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (22)

★ 【浙江专用】2014届高考英语一轮复习课时作业(二)必修1Unit 2《English around the world》

★ 四川省广安市2014高考英语一轮基础训练题（7）及答案

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (54)

★ 【三维设计】2017版（江苏专用）二轮复习练习：必修2 Unit 1《Tales of the unexplained》单元检测（含解析）

★ 2017届高考英语二轮复习大题冲关秘籍完形填空之记叙文：解题技巧（含解析）

★ 2017高考四川省广安市英语阅读理解一轮系列训练：7（含解析）

★ 2017届高考英语二轮复习课时训练：7（含解析）