Air travel can be annoying. But research now suggests global warming could make it much worse. To get off the ground in really hot weather, planes may be forced to carry fewer passengers. That might mean a little more space, which would be good. However, it also would make the passengers pay more.

    Average air temperatures around the world are rising because people are polluting the air with an increasing number of greenhouse gases, which, such as carbon dioxide, are a byproduct (副产品) of burning fuels. Those warmer temperatures can influence an airplane's ability to fly because air molecules (分子) spread out more as the air warms. This produces less lift under a plane's wings, so a plane must be lighter to take off in hot weather than on cooler days.

It can even prove too dangerous for some planes to attempt a take-off. A record of June heat wave in the American Southwest, for instance, caused flight cancellations in Phoenix, Ariz. One airline's planes were cleared to operate only up to 47.8 degree Celsius. On June 20, Phoenix reached 48.3℃!

    Radley Horton is a climate scientist at Columbia University. Two years ago, he and his graduate student Ethan David Coffel studied the impact of warming at four U.S. airports and found that warming of track could triple (使成三倍) the number of days when planes face weight restrictions. Later, they explored the impact of rising temperatures on live types of commercial planes flying out of 19 of the world's busiest airports. In the coming decades, as many as one to three out of every 10 flights that take off during the hottest time of day could face weight. That would be equal to taking a dozen people off the plane, the researchers calculated.

    A child who suffers bullying(霸凌) usually has low self-esteem and their ability to learn and be successful at school is greatly lessened. Therefore, bullying must be stopped.

    The best and most obvious way to stop bullying in schools is for parents to change the way they raise their children at home. Of course, this is much easier said than done and everyone raises their children differently. Bullies, however, come from homes where physical punishment is used and children have been taught that physical violence is the way to handle problems and “get their way”. Bullies usually also come from homes where the parents fight a lot, so children have been modeled on such violence. Parental involvement is often lacking in bullies' lives and there seems to be little warmth.

    Early intervention (干预) is truly the best way to stop bullying, but parents of the victims or therapists(治疗师) can't alter the bully's home environment. Some things can be done at the school level, however. Most school programs that address bullying apply a multi-faceted(多层面的) method to the problem.

    Hand out questionnaires to all students and teachers and discuss if bullying is occurring. Define exactly what constitutes(构成) bullying at school. The questionnaire is a wonderful tool that allows the school to see how widespread bullying is and what forms it is taking. It is a good way to start to solve the problem.

    Get the children's parents involved in a bullying program. If parents of the bullies and the victims are not aware of what is going on at school, then the whole bullying program will not be effective. Stopping bullying in school takes teamwork and concentrated effort on everyone's part. Bullying also should be discussed during parent-teacher conferences and PTA meetings. Parental awareness is the key.

    In the classroom setting, all teachers should work with the students on bullying. Oftentimes even the teacher is being bullied in the classroom and a program should be set up to teach about bullying. Children understand modeling behaviors and role-play and acting out bullying situations is a very effective tool. Have students role-play a bullying situation.

    Want to choose an English novel to enjoy? Here are four popular books sold on the website of Amazon, with formats and editions of kindle, hardcover, or paperback.

    Traveling to Europe to see its famous monuments like the Eiffel Tower in Paris and the Colosseum(古罗马竞技场)in Rome, is not exactly the ideal vacation for kids. Fortunately, Europe has more to offer than lots of old churches and ancient history. You can enjoy some fun with your kids in the sun at some of the famous beaches of the continent.

    Mykonos, Greece

    The closer you get to the equator, the longer the beach season is, and Greece is wonderful for that. You can enjoy beautiful green water, public chairs and lovely umbrellas at the beaches in Mykonos.

    Dubrovnik, Croatia

    There's nothing more attractive than the beautiful beaches bordering Dubrovnik, Croatia's most beautiful city. It's surrounded by stone walls like a castle. It almost makes you feel like you're suntanning(晒黑皮肤)at Hogwarts, where the hero Harry Potter of the story is trained!

    Sicily, Italy

    Rabbit Beach on the island of Sicily offers shallow and crystal clear waters, making it a perfect beach for families with young children. And if you want to add interest to your experience, try snorkeling(徒手潜水).

    Nice, France

    Lined with palm trees and first-class hotels, the city of Nice, located on the French Riviera, offers a whole coastline of Mediterranean beaches. Because they're in the heart of the city, these beaches attract a large crowd. So if you're looking for something more private, you'll have to travel a few miles outside of the city center.

    Ribadeo, Spain

    At low tide, Playa de las Catedrales in Ribadeo, Spain is the perfect beach to take in the natural wonders without urban amusements like restaurants, bars or huge crowds. It boasts beautiful wild flowers and unique rock formations making it truly a picture worthy.

    Each applicant to Harvard College is considered with great care. We consider each applicant to Harvard College as a whole person, and put enormous care into evaluating every application. We hope you will explore the information in this section to understand what we look for in our admissions process.

    How to Apply

    Submit your application through the Common Application, the Coalition Application, or the Universal College Application. Each is treated equally by the Admissions Committee. Complete and submit your materials as soon as possible to ensure full and timely consideration of your application. View our Application Tips for step-by-step information.

    When to Apply

    What We Look For

    We seek promising students who will contribute to the Harvard community during their college years, and to society throughout their lives. While academic accomplishment is the basic requirement, the Admission Committee considers many other factors—strong personal qualities, special talents or excellences of all kinds, perspectives formed by unusual personal circumstances, and the ability to take advantage of available resources and opportunities.

    We outline everything you need to apply to Harvard.

    Click https: //college.harvard.edu/admissions/apply to get detailed requirements.

The Outdoor City Adventure Book Festival

    For one week in July, Sheffield Central Library becomes the center of adventure in the Outdoor City. Check out some of the events. Most of them are free but early booking is recommended.

    July 10

    Bee Quest - A Hunt for the World's Most Elusive (难以捕捉的) Bees Central library Carpenter Room, 7:00-8:30pm.

    A hunt for the world's most elusive bees leads Professor Dave Goulson from Poland to Patagonia, deep into the Ecuadorian Jungle. He also explores closer to home.

    Among secret places hidden right under our noses and through his scientific expertise (专业知识), shows us that beauty hides in the most surprising places.

    July 11

    Clarion Call: A Heartfelt Tribute to Sheffield's Access Pioneers

    Central library Carpenter Room, 10:30-11:30am.

    Well-known walker, activist and campaigner, Terry Howard takes us back a hundred years and shares the story of the role Sheffielders played in the first fights for our right to freely walk on the Peak District moors (旷野). The Clarion Ramblers is thought to be the first working class walking club. This is the story of their important role in gaining us the access we all enjoy today.

    July 12

    The Wainwrights in Color Central Library Carpenter Room, 1:30-2:30pm.

    Inspired by the work of the great Alfred Wainwright, over 10 years Andy Beck has reproduced in watercolor all 1, 500 pictures drawn in A Pictorial Guide to the Lakeland Fells. Andy speaks about how the scenes in the Lake District have changed during the last 50 years.

    July 13

    Craft (制作) Your Own Adventure Journal-A Workshop Central Library Reading Room, 2:00-3:00 pm,￡5.

    Learn paper craft techniques to make your own beautiful travel journal. Get advice from our expert tutor on using old photos adventures and holidays.

    Collecting stories and memories from your.