A few years ago, bubble tea(奶茶) exploded as a popular drink for Internet foodies(吃货) everywhere. Many take this Taiwanese drink as a guilt-free snack similar to juice or a cup of coffee. After all, it has the word "tea" in it, so it has to be healthy…right?

    Not quite. Like coffee, bubble tea's ingredients(成分，配料) might not be so bad on their own, but when they're loaded with sweetener(甜味剂) and artificial flavor(人工香料), they lose their nutritional (营养的) value fast.

    It all starts with those "bubbles" found at the bottom of your drink, which are actually round pieces of tapioca(木薯淀粉). Called "tapioca pearls(珍珠)," they're actually made from a vegetable that grows in South America. And as it turns out, those little balls are loaded with sugar—and not the nutritious, fiber-rich(富含纤维) kinds found in whole grains(全麦类), either.

Cooking tapioca pearls only makes it worse. They're typically fried in hot water, along with even more added sugar, for up to three hours. By that point, these balls could have nearly 160 calories per ¼ cup.

    And don't even get us started on what comes in the extra syrups(糖浆). Thanks to all those processed(加工的) ingredients, the average bubble tea can easily reach 300 to 400 calories per cup!

    On top of being an unhealthy habit, bubble tea could even shorten your life. In 2012, a group of German researchers from the University Hospital Aachen reportedly found aspolychlorinated biphenyls, or PCBs, in tapioca ball samples. These cancer-causing chemicals have also been shown to have other bad effects on the immune(免疫), reproductive(生殖), and nervous systems.

    You might want to lay off your bubble tea addiction. Thankfully, we have a few choices for low-calorie, healthier drinks, instead.

    One day, I was in class, feeling fine, when all of a sudden my heart started racing. I broke out in a sweat, feeling hot and cold all over. My chest hurt, I was dizzy, and I felt like I couldn't breathe. Everything went blurry around the edges. Sure I was about to faint, I jerked up from my desk and ran from the room, terrified. I didn't care what the teacher thought, or that the eyes of the entire class were on me. I just had to get out of there.

    I ran to the nearest water fountain and drank some water. For several minutes, I just stood there holding on to the fountain. What was happening? Was I having a heart attack? Slowly, the lightheadedness went away. My heart stopped racing, and every other symptom faded too. I still had no idea what had happened but I was so glad it was over.

    Still I was really worried. I'd never felt that bad in my life. What was wrong with me? What if it came back?

    And then, an hour later, it did the pounding heart, the dizziness, the feeling that I was dying. Once again, I couldn't breathe. And this time, there was also pain throughout my entire upper body. I burst into tears and ran for the hallway again, actually afraid for my life. My teacher ran after me asking what was wrong. Panicking, I managed to choke out, "I need an ambulance: Please." I was sure I was dying.

    To my surprise, though, my teacher didn't grab her phone for help. Instead, she put her hand on my arm and told me to slow down. "Breathe, "she said." you're going to be okay. You just need to calm down. "

    I felt like I was going crazy. Here I was totally losing it, and she was acting like nothing was wrong! She kept on trying to calm me down, but I wasn't ready to listen. I was sure she didn't understand how I felt. How could she? How could anyone? Finally, my teacher explained that she was pretty sure I was having a panic attack. (They are also called anxiety attacks.) She knew, she said, because the same thing had happened to her when she was my age. She told me how she'd felt, and it was almost exactly how I was feeling now. She also explained that panic attacks are caused by anxiety (basically, excessive worry and fear that is part of your everyday life).

    I was shocked. I had no idea that there was even a name for what I was feeling let alone that it happened to other people, too! When I realized that she really did understand, I felt so relieved.

    My teacher talked to my parents, and they found me a counselor to help me deal with my anxiety. I'd been going through a tough time that year. My best friend had moved to a new school, and I wasn't sure how to fit in with the girls in my class. I'd never told anyone, though--I just kept it to myself. My counselor helped me understand that not dealing with my feelings can lead to panic attacks, and that I need to talk to someone when my life is stressful.

    Now when I start feeling overwhelmed or sad, I talk to my parents or friends and my counselor about whatever is bothering me, and they all help me sort things out. This way, I' m dealing with my anxiety and stress before it gets out of control.

    My counselor has also taught me some relaxation techniques and strategies that help me calm my body down at the first sign of a panic attack. I've learned to take deep breaths and relax my muscles. Or I'll focus on something else, or just tell myself I'm going to be okay. If one thing doesn't work, I'll try another one.

    It turns out that about one in every ten people has some kind of an anxiety disorder! Knowing that it's common and that life is stressful for a lot of girls of my age has helped me realize that I don't have to be ashamed or embarrassed about it.

    By sharing my story, I want other girls of my age to know that you're not as alone as you feel, and that talking about it really does help.

    More and more people in America are celebrating the Indian holiday Diwali. Diwali is Hindi for "row of lights". It is the most important holiday in India.

    Many people around the world are beginning to celebrate it as well. The United States is one of the places where the festival is becoming more common. Diwali celebrations can now be found at American landmarks like Disneyland in California and New York City's Times Square. They are also held in many parks and museums.

    Neeta Bhasin created the Times Square event. She said Indian immigrants have found great success in America. But, she said, many Americans still do not know much about India. So, she decided to act." I felt it's about time that we should take India to mainstream America and show India's rich culture, heritage, arts and variety to the world," she said, "and I couldn't find a better place than Times Square."

    Bhasin came to the United States from India 40 years ago. She is president of ASB Communications, the marketing firm behind Diwali at Times Square. Tens of thousands of people attend the event, now in its fourth year.

    In India, Diwali is a five-day harvest festival held just before the Hindu New Year. The exact dates change from year to year but Diwali is always in the fall. Celebrations include lighting oil lamps or candles called "diyas".

    A Diwali celebration will light up Disney California Adventure Park in Anaheim this year. Visitors can watch performances of traditional Indian dances and take part in a Bollywood dance party. The event is part of a Festival of Holidays program at the theme park to show cultural traditions from around the world. The program takes place on November 10th through January 7th.

    San Antonio, Texas, also holds a Diwali celebration. And it is one of the nation's largest celebrations, with more than 15,000 people in attendance each year. Visitors can enjoy Indian dance，food and fireworks. Organizers also plan to float hundreds of lighted candles in the San Antonio River, along the city's famous River Walk.

    Have you ever taken a test that you thought you could have passed easily, only to make some silly mistakes that really hurt your grade? More than a few students have done that. And some seem to do it over and over again.

    There are several problem areas that can cause students to goof up or do poorly in a test that they could have passed.

    Some students can become overconfident in their knowledge of the subject matter. They think they know the material better than they actually do. It is easy for students to misjudge their own knowledge, and when they realize that they don't know the material, it is too late.

    What happens more often, though, is that some students feel they are smart enough to be able to guess their way through a test. So they don't bother studying the material. They are overconfident in their ability to figure things out.

    In either case, overconfidence can result in lower grades in tests. Does this apply to you?

    Another thing that can happen is that students underestimate (低估) the difficulty of the test. They expect an easy test, but the teacher throws in a real tough test that they haven't prepared for. Sometimes the teacher may cover material in the test that students weren't expecting. That can happen, especially if you weren't paying attention in class.

    Finally, there are students who don't feel that getting a good grade is important to them, so they don't bother to study or even try to do well. Such students may be trying to punish their parents, have a poor image of themselves, or are just plain foolish. Hopefully, you are not one of these students.

    Dreaming of summer picnics filled with family and fun? We've come up with 4 of the top picnic areas across the US.

    Cumberland Islands, Georgia

    Just a few hours south of Savannah, this national seashore is a wonderful picnic place. It's an unspoiled place in the Deep South with over 50 miles of hiking trails (小径). Covered in Spanish moss, the trails are lined with trees and since it's still a rural area, the stars line up for a grand show at night and create the perfect evening starlit picnic opportunity.

    Grant Park, Chicago

    If you are looking for delicious food in Chicago, go for a taste of a 20-day, lake-front, foodie festival that happens in October each year. Grab a spot near the fountain to enjoy your picnic, appreciate the city scenery and lake views and relax with family and friends. If you are there on July 4th, be sure to plan the day to include the fireworks display at the Navy Pier.

    Cranberry Islands, Maine

    Here, you'll enjoy natural picnics with island views. The islands are a delightful group of islands about 20 minutes offshore from Acadia National Park. You can visit the islands by private boat or ferry service. Bring a picnic basket along for the ride as it's a romantic picnic area to take your special someone or go for a family outing to visit the islands.

    Big Sur, California

    The Point Lobos State Reserve is a small gem. Besides the coastal wildlife there are rare plant communities, and unique geological formations. It's good to have a picnic there. We recommend bringing a telescope, because much of the wildlife can be seen only at a distance.

Getting rid of old tyres (轮胎) has long been a problem. Most are thrown into landfills or piled up in storage. Energy recovery is another common method. This involves burning tyres to generate electricity or heat for industries, but that produces planet warming pollution; or we use them to

repair roads, but chemicals from them might pollute the ground.

Some firms, therefore, have begun exploring an alternative. One such firm is Wastefront, which owns a big tyre-recycling plant in north-east England. In a couple of years, it will be able to turn 8 million old tyres into new products, including a black liquid called TDO (轮胎衍生油).

The process works by deconstructing a tyre into steel, rubber, and carbon black. After tearing down the steel, the remaining material is exposed to high temperatures in the absence of air to make the rubber change into a mix of hydrocarbon gases, and then they're removed. What is left behind is pure carbon black. Once the removed gases cool down, a part of them liquefies(液化) into TDO. The remaining gases are to be burned to fuel the process. This creates a closed-cycle system that prevents emissions. 

The carbon black can be reused to make new tyres. That is of interest to tyre-makers because it helps efforts to become carbon neutral—achieving a balance between the amounts of carbon dioxide produced and the carbon dioxide removed from the atmosphere. Producing new carbon black requires burning heavy oil or coal, which lets off plenty of greenhouse gases.

The recovered TDO is well-suited for making diesel ( 柴油). While not completely carbon-neutral, it does produce an 80-90% reduction in emissions of carbon dioxide, compared with the conventional fuel. The future market for such cleaner fuels will remain large, even though electric vehicles are on the rise. Fossil-fueled vehicles will exist for decades, particularly the big burners of diesel—trucks, which are harder to electrify. The fuel is also needed by trains and ships. So, anything that helps clean up overall emissions is useful—especially if it also eases a mountainous waste problem.