To help the environment, many Americans have made the change from paper and plastic bags to reusable shopping bags.But a report by a Florida newspaper says that reusable shopping bags sold by some supermarkets have high levels of lead(铅), which can be dangerous to humans, especially young children.Now, there's a call for a rethink about the use of reusable shopping bags.

     “When our families go to the store looking for safe and healthy foods, the last thing they should be worrying about is a bag，”Charles Schumer, a government official said.“Quick and complete research will allow everyone to make right decisions.”

    The newspaper bought more than a dozen bags sold at Publix supermarkets from Florida supermarkets to test them for lead.The results showed that certain bags had lead levels that worried health officials.Some bags had enough lead in them to be considered dangerous waste if people were to throw the bags out with other rubbish.Lead in the bags is not likely to move onto food.But over time, paint (油漆) on the bags can break off and the bags can wear out.When this happens, lead can be freed.

    The affected (受影响的) bags were found in Florida.But Publix has more than 1，000 stores across America.Publix says that its bags don't break any laws about lead levels, but that they have asked the makers of the bags to reduce(降低) the lead levels in them.

    The bags with the highest levels of lead had beautiful designs and many pictures.Plain reusable bags without them are found to have little lead.People worried about lead levels in reusable bags can turn to cloth.Paper bags are also a good choice, since paper can be reused.

    Living among trees, plants and flowers can fill your life with beauty. And if you are a woman, it can also help you live longer. Researchers found that women who live in homes surrounded by plants appear to have lower death rates than women who live in areas with fewer plants.

    Researchers at Harvard University's T.H. Chan School of Public Health reported the finding. They looked at the information from one of the largest and oldest investigations of the women's health: the Nurse's Health Study. It began 40 years ago. It now has information on nearly 200,000 women.

    For the new study, the team looked at the death rates of more than 100,000 women between the years 2000 and 2008. Then the researchers compared the death rates of these women to the plants around their homes. The researchers also considered other things, such as the age of the women, money they earn and race. They also looked at whether or not the women smoked.

    The study found that the death rate among women who lived in the greenest spaces was 12% lower than those from the least green areas. The researchers were surprised to find such a strong connection between high vegetation levels and low death rates.

    The study suggested that living among trees, flowers and other plants lowered levels of depression. Researchers said women in greener areas spent more time with other people and exercised more. It is common knowledge that plants can help the environment in many ways. The new finding also suggested ways to the government and the city planners to grow even healthier living areas.

    The light from the campfire brightened the darkness, but it could not prevent the damp cold of Dennis's Swamp (沼泽地) creeping into their bones. It was a strange place. Martin and Tom wished that they had not accepted Jack's dare. They liked camping, but not near this swamp.

    “So,” Martin asked as they sat watching the hot coals. “How did this place get its name ? ”

    “Are you sure you want to hear it ? It's a scary story,” warned Jack.

    “Of course!” cried out Tom. “If there were anything to be scared of, you wouldn't have chosen this place!”

    “Ok, but don't say I didn't warn you,” said Jack, and he began this tale.

    “Way back in time, a man called Dennis tried to start a farm here. He built that cottage over there to live in . In those days, the area looked quite different — it was covered with tall trees and the swamp was a crystal-clear river. After three hard years, Dennis had cleared several fields and planted crops. He was so proud of his success that he refused to listen to advice.

    “ 'You are clearing too much land, ' warned one old man. ' The land is a living thing. It will hit back at you if you abuse it. '

    “ ' Silly fool,' said Dennis to himself. 'If I clear more land, I can grow more crops. I'll become wealthier. He's just jealous!'”

    “Dennis continued to chop down trees. Small animals that relied on them for food and shelter were destroyed. He was so eager to expand his farm that he did not notice the river flowing slowly towards his door. He did not notice salt seeping to the surface of the land. He did not notice swamp plants choking all the native plants.”

    “What happened? ” Martin asked. It was growing colder. He trembled, twisting his body closer to the fire.

“The land hit back —- just as the old man warned, ” Jack shrugged. “Dennis disappeared Old folks around here believe that swamp plants moved up from the river and dragged him underwater. His body was never found.”

    “What a stupid story, ” laughed Tom. “Plants can't …” Before he had finished speaking, he screamed and fainted (晕倒). The other two boys jumped up with fright, staring at Tom. Suddenly, they burst out laughing. Some green swamp ivy (常春藤) had covered Tom's face. It was a while before Tom could appreciate the joke.

    A Language Program me for Teenagers

    Welcome to Teenagers Abroad! We invite you to join us on an amazing journey of language learning.

    Our Courses

Regardless of your choice of course, you'll develop your language ability both quickly and effectively. Our Standard Course guarantees a significant increase in your confidence in a foreign language, with focused teaching in all 4 skill areas—-speaking, listening, reading and writing. Our Intensive Course builds on our Standard Course, with 10 additional lessons per week, guaranteeing(确保) the fastest possible language learning (see table below).

    Evaluation

    Students are placed into classes according to their current language skills. The majority of them take on online language test before starting their program me. However, if this is not available, students sit the exam on the first Monday of their course. Learning materials are provided to students throughout their course, and there will never be more than 15 participants in each class.

    Arrivals and Transfer

    Our programme offers the full package—students are taken good care of from the start through to the very end. They are collected from the airport upon arrival and brought to their accommodation(住宿) in comfort. We require the student's full details at least 4 weeks in advance.

    Meals / Allergies(过敏) / Special Dietary Requirements

    Students are provided with breakfast, dinner and either a cooked or packed lunch(which consists of a sandwich, a drink and a dessert). Snacks outside of mealtimes may be purchased by the student individually. We ask that you let us know of any allergies or dietary requirements as well as information about any medicines you take. Depending on the type of allergies and/ or dietary requirements, an extra charge may be made for providing special food.

    Earthquake rescue robots have experienced their final tests in Beijing. Their designers say that with these robots, rescue workers will be able to have more time to save more lives during an earthquake.

    This robot looking like a helicopter（直升机）, is called the detector-bot . It's about 4 meters long, and it took about 4 years to develop the model. Its main functions（作用）are to collect information from the air, and send goods of up to 30kilos, to people stuck in an earthquake.

    This robot has a high quality 360 degree panoramic camera. It can work day and night and will also be able to send the latest pictures from the quake area. Dr. Qi Juntong, Chinese Academy of Science, said, "Unlike other automatic machines, the most important feature of this robot is that it doesn't need a distant control. We just set the information of the earthquake-struck area on it, and then it takes off, and lands by itself. It flies as high as 3,000 meters, and as fast as 100 kilometers per hour. "

This robot has a different function — it can change as the environment changes. Its main job is to search for any signs of life in places where human rescuers are unable to go.

    As well as a detector（探测器）that finds victims（遇难者）and detects poisonous gas, a camera is placed in the 40 centimeter long robot, which can work in the dark.

    Another use for the rescuers is the supply bot, with its 10-meter-long pipe. People who are caught in the ruins will be able to get supplies including oxygen and liquids.

    Experts have said that the robots will enter production, and serve as part of the national earth- quake rescue team as soon as next year.

    WHERE TO STAY

    With its modern art museums, hidden basement bars and fast-developing food scene, Buenos Aires, Argentina's capital, is one of the most attractive cities in Latin America. Contact us, and we offer you some special hotels.

    Querido

    This is a cheerful seven-room townhouse in Villa Crespo. Its rooms are big, and each is specially designed. A hearty breakfast is served in the dining room. Querido's convenient location means Palermo Soho is a short walk away.

Doubles from ￡73, querido.com

    Home Hotel

    Design and comfort are key at this 20-room hotel in Palermo Hollywood. From Florence Knoll furniture to William Morris wallpaper, every detail has been hand-picked by the British-argentinian owners. There's an outdoor swimming pool and a garden with green trees. Weekend brunch（早午餐）is a welcome choice for tourists.

    Doubles from ￡90, homehotel.com

    Tango Hotel

    A big makeover（翻新）changed this former sewing machine factory in Monserrat into a 59-room hotel. Despite the busy location, the environment is good.

    Doubles from ＄75, tangohotel.com

    La Querencia

    Close to Constitucion, this comfortable four-room hotel in San Telmo is run by a Frenchman, Yann. Decoration is simple but the place is spotless. Guests can make use of the kitchen where Yann prepares breakfast and enjoy their meals in the dining room or in the yard.

    Doubles from ＄55, laquerencia.com