人教版高中英语必修 4 Unit 2 Working the land Reading 1 课件 （共19张）

课件19张PPT。 Unit 2
Working the LandHave you ever been to the countryside?
What did you see or do there?Lead-inFree-talkingworking the land / farmingsoilcropsweather &climateirrigating
(灌溉)transplanting
(插秧)fertilizing
(施肥)ploughing
(犁地) ……Have you ever grown any plants? Free-talkingBuy or select the seeds.Plough or turn over the soil.Sow the seeds in the ground.remove the weeds, fertilize, and keep the plants free from pests. Have you ever grown any plants? If so, what did you do to grow them?If not, what kind of plant would you like to try growing? How would you grow it?Making a dialoguein the pastin the modern timesFarminga disturbing problemHunger
The UN’s World Food Program (WFP) and Agriculture and Food Organization (FAO) celebrated World Food Day on October 16, 2015. The goal of the organizations is to achieve a world without?hunger.
In the 2015 report on food insecurity, statistics show that the need for food will increase as the world’s population grows and 795 million people suffer from?hunger?today. It is fewer than a decade ago. But U.N. Secretary-General Ban Ki Moon said the goal is to win the battle of ridding the world of hunger?by 2030, which is still a long way to go.
According to a study published in the journal?Science, half of the world’s population could face severe food shortages by the end of this century as?rising temperatures?shorten the growing season, increase the risk of drought, and reduce the harvests of dietary staples such as rice and maize(corn) by 20 percent to 40 percent. Besides, with the world population expected to double by the end of the century, the need for food will become increasingly urgent. Another cause for the food shortage is the diversion of food crops, maize in particular, for making first-generation biofuels. An estimated 100 million tons of grain per year are being changed from food to fuel. As farmers devoted larger parts of their crops to fuel production than in previous years, land and resources available for food production were reduced. Therefore, less food is available for human consumption, especially in developing and least developed countries, where a family's daily money for food purchases are extremely limited.? Moreover, due to the expanding of the modern industry, people will have fewer and fewer places to turn to for food when their local supplies begin to run out.
1. What causes the food shortage in the world?Discussing (group work)Rising food pricesUncontrolled world population growth
annual world grains output has declined because of climate changelots of farmland has been lost due to the rapid expanding of industry?crops such as maize are used to make fuels (biofuel)……2. What can we do to help the world end hunger?Make good use of the landprovide technology to improve outputPlant a new kind of foodCirculate the knowledge of advanced farmingStop the pollution to the environment and protect the soil in the field.
……Making a speech Suppose you are invited to give a talk to your classmates about the global food shortage. Try to use 5-6 words listed below in your speech.statistics food shortage output hunger crops circulate disturbing struggle expand battle equip grain decade rid…of Tips:
1. describe the situation
2. talk about the reasons
3. give suggestions
A Poem
By Li ShenFarmers weeding at noon,
Sweat down the field soon.
Who knows food on a tray,
Due to their toiling day.