Experiments under way in several labs aim to create beneficial types of genetically modified foods, including starchier potatoes and caffeine-free coffee beans. Genetic engineers are even trying to transfer genes from a cold-winter fish to make a frost-resistant tomato.

    A low-sugar GM strawberry now in the works might one day allow people with health problems such as diabetes (糖尿病) to enjoy the little delicious red fruits again. GM beans and grains rich in protein(蛋白质) might help people at risk of developing kwashiorkor. Kwashiorkor, a disease caused by severe lack of protein, is common in parts of the world where there are severe food shortages.

    Commenting on GM foods, Jonathon Jones, a British researcher, said: "The future benefits will be enormous（巨大的）, and the best is yet to come". To some people, GM foods are no different from unmodified foods. "A tomato is a tomato," said Brian Sansoni, an American food manufacturer.

    Critics of GM foods challenge Sansoni's opinion. They worry about the harm that GM crops might do to people, other animals, and plants.

    In a recent lab study conducted at Cornell University, scientists tested pollen(花粉) made by BT corn, which makes up one-fourth of the U.S. corn crop. The scientist dropped the pollen onto milkweed, a plant that is the only known food source of a butterfly caterpillar(毛虫). Within four days of feeding on the leaves, almost half of a test group of caterpillars died. "This is a warning bell." said Cornell researcher Linda Raynor.

    Some insects that are not killed by GM foods might find themselves made stronger. How so? The insecticides are used on the crops to kill the pests. But GM plants produce a continuous level of insecticide. Insects relying on those crops may develop resistance to the plants and they may also develop a resistance to the insecticide.

    At the forum on GM food held last year in Canada. GM crops that have been made resistant to the herbicide might crossbreed with wild plants, creating "superweeds" that could take over whole fields.

    So where do you stand? Should GM food be banned in the United States, as they are in parts of Europe? Or do their benefits outweigh（胜过） any of the risks they might carry?

    A mouse looked through the hole in the wall to see the farmer and his wife open a pckage, and he was devastated to discover it was a mousetrap. Returning to the farmyard, he warned everyone. “There is a mousetrap in the house! There is a mousetrap inthe house! There is a mousetrap inthe house! ”

    The chicken raised her head and said, “Thanks for your warning. Mr. Mouse, but why should I be bothered by a mousetrap?” the pig sympathized, but said, “Wow, Mr. Mouse, I'm sorry for you I can tell this is a great concern to you, but it is none of my business.” The mouse returned to the house, head down and depressed, to face the farmer's mousetrap alone.

The very night a sound was heard throughthe house—-like that of a mouse trap catching its prey. The farmer's wife rushed to see what was caught. In the darkness, she did not see it was a snake whose tailwas caught by the trap, and it bit her. The farmer rushed her to the hospital and she returned home with a fever.

    The farmer killed the chicken to make fresh chicken soup for his wife, but her sickness continued. Frineds and neighbors came to visit her, and to feed them, the farmer butchered the pig. Then she died. So many people came for her funeral that the farmer had the cow cooked to provide enough meat for all of them.

    The mouse looked upon it all from his hole in the wall with great sadness.

    New Zealand's government is hoping to make the nation greener by planting 100 million trees each year, ensuring the electricity grid（电网） runs entirely from renewable energy, and spending more money on cycle ways and rail transport. The government's plan is to reduce its net greenhouse gas emissionto zero by the year 2050.

    New Zealand's prime minister Jacinda Ardern has set ambitious environmental policies to confronta warming planet. “We will absolutely focus on the challenge of climate change,” said Ardern. “That will include a zero carbon government policy. That will include an independent climate commission. That will include making sure that we have an all gases, all sectors emissions trading scheme,” she added. According to the Associated Press (AP), Arden said the goal of doubling the amount of trees the country plants each year is “absolutely achievable.”

    Not everybody is happy with the plans. Many farmers are worried they will be required to pay more if they are absorbed into an emissions trading plan. “There is concern that if this should happen, New Zealand will become less competitive with other food-producing nations.” said Katie Milne, the president of Federated Farmers.

    More than 80 percent of New Zealand's electricity already comes from renewable resources. The AP reported that Ardern wants to increase it to 100 percent by 2035, in part by investing more in solar, which currently takes up only 0.1 percent of the country's total renewable energy slice.

    A recent university study found that current electric cars could be used for 87% of daily car journeys in the US. That figure could rise to 98% by 2020.

One hurdle to the widespread adoption of electric cars has been “range anxiety” —drivers' concerns about running out of petrol on a journey. While petrol stations are conveniently located across national road systems, the necessary network of electric charging stations is still being developed. In fact, charging points are becoming increasingly common throughout the USA.

    Attitudes towards electric vehicles have changed quite considerably over the last few years. Not that long ago, electric cars met with doubt, and their high price drove customers away. Thanks to improvements in battery capacity(电池容量), recharging times, performance and price, the current generation of electric cars is starting to persuade critics.

    As well as progress on the road, electric vehicles are taking to the sea and sky. Electric boats are among the oldest electric vehicles, having enjoyed several decades of popularity from the late 19th to the early 20th century before petrol-powered outboard motors took over. Now, the global drive for renewable energy sources is bringing electric boats back. Steps towards electric planes are also being made, with Airbus and NASA among the organizations developing and testing battery-powered planes. The experiments could soon make electric flight a reality.

    Electric vehicles do not produce any emissions(排放物). Were the US to act on the study's findings and replace 87 percent of its cars with electric vehicles, it would reduce the national demand for petrol by 61 per cent. However, because of the production processes and the generation of electricity required to charge these vehicles, they cannot claim to be completely emission-free. Even so, as many countries continue to increase their use of renewable energy sources, electric vehicles will become even cleaner.

    It's difficult to know the exact answer to whether babies dream and what they dream about. However, sleep experts have shown that newborns dream the most in the first two weeks after birth. Babies spend most of their sleeping time in REM(rapid eye movement) stage. As dreaming takes place in a light state of sleep, newborns tend to wake up due to noises, movements and other factors. When dreaming, newborns make a few noises and their eyes move. They may move around the sides or up and down. They may laugh, scream, or cry during the REM sleep. Also, their facial muscles, hands, and legs move, due to which they may wake up. So wrapping a baby in swaddling(裹紧的) clothes can keep the baby's body from moving and help them sleep better. As babies grow, their body movement decreases when dreaming.

    Studies say that the brain activity associated with dreaming is essential for the babies' mental development. During the REM stage, the flow of blood to the brain increases. As a result, certain nerve proteins are produced, which are the building units of the brain. Babies get stimulation from what they see, hear, or feel. The brain processes the information acquired while awake, and stores what is essential to the individual. A study concludes that babies learned while they were dreaming.

    What's the time for babies to start dreaming? Researchers say that before birth, babies start experiencing REM sleep around week 25, and so they may start dreaming at the point. On the contrary, some psychologists believe that children start having dreams when they are about 5 years old. At that age, they start becoming aware of themselves and begin to understand the things around them, which is what dreams are actually made of.

    My family and I never talked about school as the ticket to a future. I was in the classrooms, but I wasn't there to learn to write, read or even speak. When it was my turn to read, I wanted to hide. I was 13 years old, but I already hated being who I was.

    I had an English teacher, Mr. Creech, who knew I couldn't read. In one of my first lessons the teacher said that anyone who had a reading age below six had to stand up. I felt so embarrassed. But at the same time, it made me realize that I needed to change the situation. I was determined it wouldn't happen again. Later that day, Mr. Creech encouraged me and promised he would try his best to help me learn to read. From then on, I never gave up practicing reading.

    Now I was 41 years old. One day, I planned to fly back to Texas to visit my friends and family. On my way from the airport, I saw Mr. Creech buying himself a drink. I rushed over and reached into my pocket to pay for him.” Do I know you?” he asked.” Yes, sir, you do know me,” I answered excitedly.” My name is Anthony Hamilton. You taught me English.” The look on his face told me that he remembered the boy he'd once encouraged.

    "I'm so glad I had a chance to see you," I said. "And Mr. Creech, I have great news to share." I told him I had learned to read. But that wasn't all. I had become a published author and an active speaker." The next time you get another Anthony Hamilton in your classroom, please encourage him to read as well." I added.

    The experts say what once worried me has a name: dyslexia(诵读困难症). But I can tell you it was a lack of desire for education.