Breakthroughs in science and technology are paving the way for modern cities to support bigger populations. Now, we see the most exciting urban innovations to show you exactly how they'll improve your city's infrastructure(基础设施).

Lighting Up The Night

    Anthony Di Mari dreamed up an electric tree to help irrigate public parks and light them at night. These electric trees contain a special infill (填充物) that collects water from rainfall. The water is then distributed through a shallow underground irrigation system with the help from the trees' swaying movement. An electric motor turns energy from the waving of the artificial trees into electricity, which is used to light up the trees' outer LEDs.

Thinking Outside The Box

    As more people flock to urban areas, city planners will need to get increasingly creative about how to satisfy residents' health and transportation needs within decreasing available space. One way to achieve this is by updating infrastructure to support biking and walking by building suspended(悬浮的) roundabouts like hovering in the Netherlands. By lifting bicycle and pedestrian traffic above busy roadways, cities can significantly decrease over-crowded traffic condition.

Waving Hello To Clean Energy

    Cities that don't receive enough sunlight may find an attractive alternative in wave power. Since ocean waves rarely experience disruption(中断), electric engines driven by their clockwork push-and-pull can reliably provide power throughout the year. Further, thanks to advances in wave power technology, engineers have been able to move wave power engines farther offshore, where the waves pack the most punch, making the engines extremely efficient. So in the future, heavily populated coastal cities may use wave to meet their energy needs.

    Some people will do just about anything to save money. And I am one of them .Take my family's last vacation for example .It was my six-year-old son's winter break form school ,and we were heading home form Fort Lauderdale after a weeklong trip. The flight was overbooked ,and Delta , the airline ,offered us $400 per person in credits(积分) to give up our seats and leave the next day .I had a meeting in New York，So I had to get back . But that didn't mean my husband and my son couldn't stay. I took my nine-month-old and took off for home.

    The next day my husband and son were offered more credits to take an even later flight.Yes, I encouraged一okay, ordered-them to wait it out at the airport, to "earn" more Delta Dollars. Our total take: $1,600. Not bad, huh?

    Now some people may think I'm a bad mother and not such a great wife either. But as a big-time bargain hunter, I know the value of a dollar. And these days, a good deal(交易) is something few of us can afford to pass up.

    I've made a living looking for the best deals and exposing the worst tricks .I have been the consumer reporter of NBC's Today show for over a decade. I have written a couple

    of books including one titled Tricks of the Trade: A Consumer Survival Guide. And I really do  what I believe in.

    I tell you this because there is no shame in getting your money's worth. I'm also tightfisted when it comes to shoes, clothes for my children, and expensive restaurants. But I wouldn't hesitate (犹豫)to spend on a good haircut. It keeps it longer, and it's the first thing people notice. And I will also spend on a classic piece of furniture. Quality lasts.

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    New York Time—A gunman killed eight people at a mall in Omaha this afternoon and then killed himself, setting off panic among holiday shoppers, the police said.

    "The person who we believe to be the shooter has died from self-inflicted gunshot wounds," Sergeant Teresa Negron of the Omaha Police Department said at televised news." We have been able to clear the mall," she said." We don't believe we have any other shooters." The police said that at least five other people had been injured in the shootings.

    She did not give the shooter's identity." We are still conducting the investigation," Sergeant Negron said, adding that the city's mayor, who was out of town, was on his way back to Omaha.

    She said the police received a 911 call from someone inside the Westroads Mall on the west side of Omaha, and shots could be heard in the background. The first police officers arrived at the mall six minutes after the first call, she said but by then the shootings were over.

    It is reported that the gunman left a suicide note that was found at his home by relatives. A law enforcement official who spoke on condition of anonymity（匿名）said the note indicated that the gunman wanted to "go out in style."

    The shootings broke the usually ordinary routine of holiday shopping. The gunman was said by some witnesses to have fired about 20 shots into a crowd. Some customers and workers ran screaming from the mall, while others dived into dressing rooms to hide from the shooter.

    Shoppers and store workers were trapped inside the mall, which has roughly 135 stores. Others streamed out of mall exits with their hands raised. President Bush was in Omaha this morning to deliver a speech, but he had left the city by the time the shootings took place.

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    Coca-Cola has created a publicity stunt (作秀) in Singapore — a vending machine (自动售货机) which gives out free cans of Coke in return for (作为对…回报) hugs. The whacky idea is part of the company's Open Haziness campaign (运动) designed to attract young people in Singapore.

    Students at the National University of Singapore were surprised to find that the soft drinks company had placed the machine in the schoolyard. But instead of the drinks brand's logo (标志), the words “Hug Me” are written across its red-and-white logo. Instead of paying money, customers have to hug the drinks machine to receive a free can of Coke.

    Public displays of affection are uncommon and have long been discouraged in Singapore, but are on the rise among young people. The move is part of a campaign created by advertising firm Ogilvy & Mather, intended to let the youth to see the brand as a non-threatening (无威胁的) friend.

    Leonardo O'Grady, leader of the campaign, said, “Happiness is contagious (传染的). The Coca-Cola Hug Machine is a single idea to spread some happiness. We want to spread happiness in an unexpected, creative way to attract not only the people present, but the audience at large.”

    He hopes that it will encourage consumers to bring positivity, optimism (乐观) and fun into their lives and to open a Coke, sharing a little happiness.

    The machines haw been such a success that there are plans to roll them out across Asia. Mr. O'Grady added, “The reaction was amazing — at one point we had four to five people hugging the machine at the same time as well as each other! In fact, there was a long line of people looking to give hugs.”

He was 50 years old when I was born, and a "Mr. Mom" long before anyone had a name for it. I didn't know why he was home instead of Mom, but I was young and the only one of my friends who had their dad around. I considered myself very lucky.

Dad did so many things for me during my grade-school years. He asked the school bus driver to pick me up at my house instead of the usual bus stop that was six blocks away. He always had my lunch ready for me when I came home—usually a peanut butter and sandwich that was shaped for the season. My favorite was at Christmas. The sandwiches would be covered with green sugar and cut in the shape of a tree.

As I got a little older and tried to gain my independence, I wanted to move away from those "childish" signs of his love. But he wasn't going to give up. In high school and no longer able to go home for lunch, I began taking my own. Dad would get up a little earlier and make it for me. I never knew what to expect. The outside of the bag might be covered with his way of a mountain scene (it became his trademark or a heart with the word "Dad-n-Angel" in its center. Inside there would be a note with that same heart or an "I love you". Many times he would write a joke or a riddle. He always had some silly saying to make me smile and let me know that he loved me.

    I used to hide my lunch so no one would see the bag or read the note, but that didn't last long. One of my friends saw the note one day, grabbed it, and passed it around the lunch room. My face burned. To my astonishment, the next day all my friends were waiting to see the note. From the way they acted, I think they all wished they had someone who showed them that kind of love. I was so proud to have him as my father. Throughout the rest of my high school years, I received those notes, and still have a majority of them.

    And still it didn't end. When I left home for college (the last one to leave), I thought the messages would stop. But my friends and I were glad that his action continued.

I began getting letters almost every Friday. The front-desk worker always knew who the letters were from—the return address said, "The Hunk." Many times the envelopes were addressed in crayon and along with the enclosed letters were usually drawings of our cat and dog, stick figures of him and mom and if I had been home the weekend before, of me racing around town with friends and using the house as a pit stop. He also had his mountain scene and the hearten-cased inscription, "Dad-n-Angle".

    During my elementary school years, I used to compare my mom with my best friend Tiffany's mom.

    Tiffany's mom always gave her lots of money to buy the most fashionable clothes and favorite food. Her mom allowed her to do anything she liked. I really admired Tiffany. My mom didn't give me much pocket money and she always told me that I should behave myself. I was annoyed with her.

Whenever I didn't get what I wanted, I would complain to my mom, Tiffany's mom would give her that! I wish she were my mom. Every time, my mom would calmly say "Poor Tiffany". I couldn't understand her. "She shouldn't be feeling sorry for Tiffany!" I thought. "She should be feeling sorry for me."

One day, I couldn't help saying to Mom, "Poor Tiffany? Lucky Tiffany! She gets everything she wants! Why do you feel sorry for her?" I burst into tears.

My mom sat down next to me and said softly. "Yes, I do feel sorry for her. I have been teaching you a lesson that she will never be taught."

I looked up at her. "What are you talking about?"

Mom said with care, "One day she will really want something. Maybe she'll find out that she can't have it. Her mother won't always be around to give her money, and what's more, money can't buy everything."

She continued, "I have taught you valuable lessons by not giving you everything you want. You'll know how to look for bargains and save money, but she won't. You'll understand that you need to work hard to get the things that you want but she won't. When Tiffany is a grown woman, she'll wake up one day and she will be wishing that she had a mom like the one you've got. Life lessons are more important than modern clothes and delicious food."

    It took some time, but I eventually understood my mom's words. Now I am a happy and successful woman.