The production of coffee beans is a huge, profitable business, but, unfortunately, full-sun production is taking over the industry and
bringing about a lot of damage. The change in how coffee is grown from shade-grown，production to full-sun production endangers the very existence of, certain animals and birds, and even disturbs the world's ecological balance.
On a local level, the damage of the forest required by full-sun fields affects the area's birds and animals. The shade of the forest trees provides a home for birds and other special(物种) that depend on the trees' flowers and fruits. Full-sun coffee growers destroy this forest home. As a result, many special are quickly dying out.
On a more global level, the destruction of the rainforest for full-sun coffee fields also threatens(威胁)human life. Medical research often makes use of the forests' plant and animal life, and the destruction of such species could prevent researchers from finding cures for certain diseases. In addition, new coffee-growing techniques are poisoning the water locally, and eventually the world's groundwater.
Both locally and globally, the continued spread of full-sun coffee plantations (种植园)could mean the destruction of the rainforest ecology. The loss of shade trees is already causing a slight change in the world's climate,
and studies show that loss of oxygen-giving trees also leads to air pollution and global warming. Moreover, the new growing techniques are contributing to acidic(酸性的) soil conditions.
It is obvious that the way much coffee is grown affects many aspects many aspects of life, from the local environment to the global ecology.
But consumers do have a choice. They can purchase shade-grown coffee whenever possible, although at a higher cost. The future health of
the planet and mankind is surely worth more than an inexpensive cup of coffee.

   What will power your house in the future？Nuclear, wind, or solar power？According toscientists at the Massachusetts Institute of Technology(MIT)in the US, it might beleaves—but artificial(人造的)ones.

    Natural leaves are able to change sunlight and water intoenergy. It is known as photosynthesis(光合作用). Nowresearchers have found a way to imitate this seemingly simple process.

    The artificial leaf developed by Daniel Nocera and hiscolleagues at MIT can be seen as a special silicon chip with catalysts(催化剂). Similar tonatural leaves, it can splitwater into hydrogen and oxygen when put into a bucket of water. The hydrogenand oxygen gases are then stored in a fuel cell, which usesthose two materials to produce electricity, located eitheron top of a house or beside the house.

Though the leaf is only about the shape of a poker card, scientistsclaimed that it is promising to be an inexpensive source of electricity indeveloping countries.“ One can imagine villages in India and Africa not longfrom now purchasing an affordable basic power system based on this technology, ”said Noceraat a conference of the American Chemical Society.

    The artificial leaf is not a new idea. The first artificial leafwas invented in 1997 but was too expensive and unstable for practical use. Thenew leaf, by contrast, is made ofcheap materials, easy to useand highly stable. In laboratory studies, Nocera showedthat an artificial leaf prototype(原型)could operatecontinuously for at least 45 hours without a drop in activity.

    The wonderful improvements come from Nocera's recent discoveryof several powerful, new andinexpensive catalysts. These catalysts make the energy transformation insidethe leaf more efficient with water and sunlight. Right now, the new leafis about 10 times more efficient at carrying out photosynthesis than a naturalone. Besides, the device canrun in whatever water is available；that is, it doesn'tneed pure water. This is important for some countries that don't have access topure water.

    With the goal to “make each home its own power station” and“give energy to the poor”, scientistsbelieve that the new technology could be widely used in developing countries, especially inIndia and rural China.

    Although Paris is often considered the city of romance, close to a million adult who call it home are single. Many single people say that France's capital is one of the most difficult places to meet people. The complaints of this lonely group have inspired a new phenomenon known as “supermarket dating.” At Galerie Lafayette Gourmet, singles can shop for more than just the items on their grocery list. They can look for someone who has blue eyes, brown hair, and is 1.8 meters tall, or whatever may be on their romantic shopping list.

    At this Paris location, single people of all ages can schedule their shopping for Thursday nights between 6:30 and 9:00 p.m. When they walk through the door, they pick up a purple basket to advise that they are looking for love. They try to arrive early because the baskets disappear quickly, and then they have to wait in line for their turn to wander the store aisles.

    With purple baskets in hand, shoppers can consider their romantic options while they pick out their groceries. When they are ready to pay, they can go to the checkout line for singles who want to chat.

    Most of the people who look for love in the supermarket are skeptical of Internet dating. They know that it is easy to embellish（美化）one's appearance or to lie about one's age over the Internet. The supermarket, on the other hand, is considered a safe and casual environment in which to meet a potential match. In addition, what one finds in another's grocery basket can say a thing or two about that person's character or intentions. Buying pet food can be a man's way of showing a potential match that he has a sensitive side. Women who fill their baskets with low-fat food show their healthy style of living. These days it's possible to find much more than food at a grocery store.

    Just 10 years ago, I sat across the desk from a doctor. “Yes,” he said, “there is something wrong with the left, upper lung. You are suffering a severe cancer. You'll have to give up work at once. Later on, we'll see.”

    Feeling like a man who is in mid­career has suddenly been placed under sentence of death, I left the doctor's office, walked over to the park, and sat down on a chair. I needed to think. In the next 3 days, I cleared up my affairs, then I went home, got into bed, and set my watch to tick off not the minutes, but the months. Two years later, I left my bed and began the long climb back. It was another year before I made it.

    I speak of this experience because these years that passed so slowly taught me what to value and what to believe. I realize now that each day, to me, is a precious thing. I've learned to appreciate those little things I never thought I had the time to notice before: the play of light on running water, the music of the wind.

    Frequently, I sit back and say to myself, “Let me make note of this moment I'm living right now, because in it I'm well, happy and hard at work doing what I like best to do. It won't always be like this, so while it is, I'll make the most of it—and afterwards, I remember—and be grateful. I contribute all these to that long time spent on the fight with cancer.”

    Elizabeth Blackwell was born in England in 1821, and moved to New York City when she was ten years old. One day she decided that she wanted to become a doctor. Thai was nearly impossible for n woman in the middle of the nineteenth century. After writing many tellers asking for admission (录取) to medical schools, she was finally accepted by a doctor in Philadelphia. She was so determined that she taught school and gave music lessons to get money for the cost of schooling.

    In 1849, after graduation from medical school. She decided to further her education in Paris. She wanted to be a surgeon (外科医生), but a serious eye problem forced her to give up the idea.

    Upon returning to the United States, she found it difficult to start her own practice because she was a woman. By 1857 Elizabeth and her sister, also n doctor, along with another woman doctor, managed to open a new hospital, the first for women and children. Besides being the first woman physician and founding her own hospital, she also set up the first medical school for women.

    A woman was sitting by herself in a movie theatre. The movie she was about to see was a musical version (版本)of a very successful book that had sold a million copies that year.

    As the woman was waiting for the movie to begin, she noticed that the theatre was very crowded but the two seats next to her were empty.

    Suddenly a large man carrying a big fur coat walked down the aisle (走廊) and sat down, placing the fur coat on the seat next to her.

    When the lights went out, the fur coat began to move, and the woman realized it was not a coat but a large furry dog. He was sitting up in the seat, watching the movie screen with great interest. As soon as the movie started, the dog began to nod his head and beat his paws（爪） in perfect time to the music.

    When the movie was over, the woman turned to the man and said, "Excuse me, sir, but I've never seen such a well-behaved dog in a movie theatre before. Does he go to the movies often?"

    "Oh, yes," replied the man.

    "And he seemed to enjoy everything so much," she said, "It was just amazing!"

    "As a matter of fact, it surprised me, too," said the man. "He hated the book!"