The-Advantages-and-Disadvantages-of-Genetically-Modified-FoodPPT优秀课件

1、1The Advantages and Disadvantages of Genetically Modified FoodBy Chlo School of Foreign Languages2The Advantages and Disadvantages of Genetically Modified FoodOrange juice made from 100% carrots.3The Advantages and Disadvantages of Genetically Modified FoodGenetically modified baked beans.will they

2、look and taste the same to me?4 Definition Growth of GM crops Pros and cons ConclusionThe Advantages and Disadvantages of 5Definition Genetically modified (GM) foods are foods produced from genetically modified organisms (GMO) that have had their DNA altered through genetic engineering. GM foods wer

3、e first put on the market in the early 1990s. The most common modified foods are derived from plants: soybean, corn and cotton seed oil.6Growth of GM crops The first commercially grown genetically modifiedwhole food crop was a tomato (calledFlavr Savr), which was modified to ripen without softening.

4、 7Growth of GM cropsBy 2006, in the United States 89% of soybeans, 83% of cotton, and 61% of maize (corn) were genetically modified.Between 1997 and 2009, the total surface area of land cultivated with GMOs had increased, from 4.2 million acres to 331 million acres.8Growth of GM cropsAlthough most G

5、M crops are grown inNorth America, in recent years there has been rapid growth in the area sown indeveloping countries .9Growth of GM crops In 2009 the largest increase in crop area planted to GM crops (soybeans) was in Brazil By 2009 87% of Indian cotton was GM 10Pros and cons11Advantages More prod

6、uctive and have a larger yield Offer more nutritional value and better flavor Eliminate allergy-causing properties in some foods Inbuilt resistance to pests, weeds and disease More capable of thriving in regions with poor soil or adverse climates More environment friendly More resistant and stay rip

7、e for longer Feed growing world populations Safe The meddling with nature argument made against GM foods doesnt hold water 12DisadvantagesThe grim reaper13Disadvantages Change a few genes,change the whole picture No evaluate the risks Many GM companies dont label their foods as being GM foods End fooddiversity Newer, stronger chemicals Ecological problems The claim of ending world hunger with GM food is a false claim Harvested grain germs are incapable of developing Improv