奇速英语

科学家改变植物基因以提高粮食产量

Scientists have increased the size of crops by 20 percent. They have changed how plants use photosynthesis(光合作用). This is when plants use sunlight to change carbon dioxide into oxygen. A professor said he is changing the genes(基因) of crops like rice, wheat, maize and soybean. The new plants use the energy from sunlight better.

Plants change energy into heat when they get hot. They also do this when it is cloudy. The scientists changed their genes, so plants can use more energy to grow. If crops can give 20 percent more food, it will help us have more food in the future.