高一英语Unit19 agriculture课件 人教版 课件VIP免费

1. People are earning more money, so they want to buy and eat more meat.2. People learn more about healthy food, so they want to eat more fruit.3. Fruit based alcohol such as wine 葡萄酒 is better for your health than spirits 白酒 , so people want to drink more wine and less spirits.Warming upQ.1 0102030405060708090%Growth of major farm products 1991-95 compared with 1986-90 percentages 4. Fruit juices are healthier than soft drinks such as cola or sprite, so people want to drink more juices.5. Eating fish doesn't make people as fat as eating meat, so people like eating more fish.6. When people have more money, they start buying more candy and soft drinks such as cola and sprite, there is a lot of sugar in these products. 7. When people eat more fish and meat, they need more oil to fry fish and meat, so more oil need to be made.8. As the population of China grows, more grain (rice and wheat) will be needed, even though each person eat less of it. Some of the grain produce is also used to feed pigs, sheep and cattle. 1. People want to buy different products, so farmers need to grow different things.(changes in demand)2. Farmers want to make more money. When they can grow extra crops or other crops on their land or land which they can’t use to grow grain, they will, for example, plant fruit trees. In the end, they will bring more fruit to the market.(changes in supply)Q.2 3. Some crops bring in more money than other crops. So some farmers change their produce from growing grain to, for example, fish farming or growing fruit. In the end, they will bring some more fish or fruit to the market.(changes in supply) 4. If farmers produce more meat (pigs or chickens) they n...