A点的经纬度是（　　）

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    When I was eleven years old, God gave me a gift of happiness and I had a carefree childhood in France.

    One day, on my way home from school, a truck ran over me and my legs were cut off. As I lay there bleeding, I suddenly realized that I might have to live the rest of my life without legs. How depressed I was at that moment! But then I realized that depression wouldn't get my legs back. So I decided not to waste my life feeling depressed. When my parents arrived at the hospital, they stood there quietly, looked so shocked and sad. I told them, “I've already accepted the fact. Now you also have to get used to this.”

    Ever since then, I often see my friends getting worried about little things: their bus comes late; they get bad grades on a test. But I just enjoy life.

    I am lucky to realize that it is a waste of energy to focus on what you have lost, and that the key to happiness is to take pleasure in what you have. Sounds simple, doesn't it? So why are many people unhappy?

    People often think happiness is based on what they achieve. “My whole life would improve if I had a new car.” But when you get the car and what happens? For a whole week you are walking on air. Then you go right back to being unhappy.

    Happiness is not a happening; it's a state of mind. Even though you have the whole world and you'll still be unsatisfied. And you have relatively(相对地) little but feel full of joy. Happiness comes from mastering the art of enjoying and taking pleasure in what you already have.

    We produce 500 billion of plastic bags in a year worldwide and they are thrown away polluting oceans, killing wildlife and getting dumped in landfills where they take up to 1,000 years to decompose. Researchers have been unsuccessfully looking for a solution.

    The 16-year-old Canadian high school student, Daniel Burd, from Waterloo Collegiate Institute, has discovered a way to make plastic bags degrade(降解) in as few as 3 months, a finding that won him first prize at the Canada Wide Science Fair, a ＄10,000 prize, a ＄20,000 scholarship, and a chance to revolutionize a major environmental issue.

    Burd's strategy was simple: Since plastic does eventually degrade, it must be eaten by microorganisms(微生物)．If those microorganisms could be identified, we could put them to work eating the plastic much faster than under normal conditions.

    With this goal in mind, he grounded plastic bags into a powder and concocted(调制) a solution of household chemicals, yeast(酵母) and tap water to encourage microbes growth．Then he added the plastic powder and let the microbes work their magic for 3 months．Finally, he tested the resulting bacterial culture on plastic bags, exposing one plastic sample to dead bacteria as a control．Sure enough, the plastic exposed(暴露) to the live bacteria was 17% lighter than the control after six weeks.

    The inputs are cheap, maintaining the required temperature takes little energy because microbes produce heat as they work, and the only outputs are water and tiny levels of carbon dioxide.

    "Almost every week I have to do chores and when I open the closet door, I have piles of plastic bags falling on top of me．One day, I got tired of it and I wanted to know what other people are doing with these plastic bags．The answer: not much．So I decided to do something myself." Said Daniel Burd.