Unit 2 Chemical or Organic farming?

Unit 2 Chemical or Organic farming?

First reading ( 3ms ) Main idea of the text ? Chemical fertilizes can cause many problems, so organic farming is becoming more popular.

Read and then find out the topic sentence of each paragraph. Para 1: Para 2: Para 3: Para 4: Recently, scientists have been finding that long-term use of these fertilizer can cause damage to the land and dangerous to people’s health. Some of the problems caused by chemical fertilizers Farmers turn to organic farming. Organic farmers use many other methods to keep the soil fertile.

Second reading ( 5ms ) Read again and answer the following questions: 1.Why are chemical fertilizers so common in farming? 2.What problems are caused by using chemical fertilizers? 3. What is organic farming? 4. How do organic farmers to keep the soil fertile?

1.What do chemical fertilizers become very common in farming? • It is used as a great way to stop crop disease and increase production.

First, they damage the land by _______________________________________ chemical________________________________ for a long time. And it affects _____and _____ __________ ,since it __________ the crops and cannot be _________ ; these chemicals in the food supply ________ in the bodies, _________ cancers or other diseases. Fruit and other food with chemical grow too fast to _____________________ having more ______ than ________________________ killing the helpful bacteria and pests as well as the harmful ones. 2.What problems are caused by using chemical fertilizers? stay in the ground and underground water crops animals and humans get insides washed off build up leading to be full of much nutrition water vitamins and minerals

3.What is organic farming? Organic farming is farming without using chemical fertilizers. They focus onkeeping their soil rich and free of disease. A healthy soil reduces disease and helps crops grow strong and healthy.

Organic farming Crops growing with natural rather than chemical fertilizer Natural waste from animals Make the soil richer in minerals and more fertile A healthy soil Reduce diseases in crops Help crops grow strong and healthy

4.How do organic farmers to keep the soil fertile? Change crops every few years Peas soybeans Corn ,wheat Put the minerals back into the soil, making it rich and healthy Crops that need a deeper level of soil (vegetable) Crops that use the surface of the soil (peanuts) Planting grass to prevent wind or water from carrying away the soil and leave it in the ground to become a natural fertilizer for the next year’s crop

Retelling ( 8ms ) Retell the text according to the chart:Organic farming I.Crops growing with natural fertilizers. II.Farmers prefer natural waste from animals. Chemical fertilizer 1.make…richer and more fertile 2.reduce…and help…strong 3.the fertilizers kill…and healthy 4.keep free…from chemicals 1.leaving…is not good 2.grow…year after year III.Farmers change crops every two or three years. …to make sure what is left …

Explanations 2.reduce v make sth smaller in size,number,degree,price,etc.减少,降低 e.g. 公司尽力通过减少花销来提高利润。 The company tries to increase profits by _______________ . 今年我们已经减少了业务开支。 We ______________ expenses this year. reducing costs have reduced

3. supply vt.供给; n.供应,供求之物 supply sth. to /for sb.= provide sth. to/for sb supply sb. with sth.= provide sb. With sth. 向/为某人提供某物 in short supply短缺 medical supplies医疗用品 They supplied the children ____ toys. They supplied toys ________ the children. with to/for

[比较]supply, provide 和 afford supply向群众、市场、城市、工厂等供应物品。 provide主要指为某人、某物供应物品, 尤其指生活必需品。 afford指为一定的目的而提供所需要的东西。

10. Dr Yuan is more a farmer than a scientist. 与其说袁博士是一个科学家不如说他是一个农民。 be more than=not only 不仅仅，超过 Learning is more than reading. be more +A +than +B 与其说是B还倒不如说是A He is more an ordinary person than a leader.

Homework 1.Read the text again after class 2.Finish EX3 on WB 3.Finish the exercises on English weekly

Unit 2 Chemical or Organic farming?