Having experienced a shocking electrical accident, which caused him to become both blind and deaf, James Franco's world became completely dark and quiet for almost ten years. The loss of sight and hearing threw him into such sorrow that he tried a few times to put an end to his life. His family, especially his wife, did their best to tend and comfort him and finally he regained the will to live.

    One hot summer afternoon, he was taking a walk with a stick near his house when a thunderstorm started all at once. He stood under a large tree to avoid getting wet, but he was struck by lightning. Witnesses (目击者) thought he was dead but he woke up 20 minutes later, lying face down in muddy water. He was trembling badly, but when he opened his eyes, he could hardly believe what he saw: a tree and a muddy road. When Mrs. Franco came running up to him, shouting to their neighbors to call for help, he could see her and hear her voice for the first time in nearly ten years.

    The news of James regaining his sight and hearing quickly spread and many doctors came to examine him. Most of them said that he regained his sight and hearing from the shock he got from lightning. However, none of them could give a compelling answer as to why this should happen. The only reasonable explanation given by one doctor was that, since James lost his sight and hearing as a result of a sudden shock, perhaps, the only way for him to regain them was by another sudden shock.

    What do butterflies have in common with the human spirit? Meet Maggie, a middle-aged wife and mother who was about to find out.

    Maggie wasn't rich like a millionaire or poor in a manner of being homeless. She was living an average comfortable life. It was made even better when a baby girl came her way. She and her husband made sure their daughter had her needs met and they were still able to take a yearly vacation by the beach.

    Maggie was a partner in her husband's business. They both had a different set of duties and everything was in balance. One day a severe blow came to her husband's business, and over a three-year period the business dropped out of sight. Her husband had to totally reinvent himself and was eager to start a new business. She was happy for him and supported him fully, but still the money was not coming in.

    Maggie began to feel guilty that she wasn't contributing with any kind of income. She began job-hunting and found filling out applications somewhat difficult, especially the part asking for job references. She was self-employed with her husband for almost 20 years, which seemed to mean nothing as she was never called for an interview.

    When she was job-hunting her mom became more ill than she had been and ended up in the hospital for a week. Once Maggie's mom returned home she became her mom's helper one day a week. She did everything that her mother was not able to do any more. Of course her mom would pay her for her lime and labor but she still felt she needed to find another source of income.

    One of the first applications she had filled out finally came through. She passed the interview and was told she was exactly what they were looking for. Although it was only part-time it was exactly what she wanted. It was important for her to be home when her daughter arrived home from school.

    Within a few weeks, though, she received an e-mail saying that the company had changed the job into a full-time position so that she was not qualified. Maggie felt betrayed and felt she had been lied to. That evening she was alone at home. She welcomed the aloneness and wanted to put herself in the bathtub to kill the lonely time.

    As she knew she would, Maggie began to cry, softly at first just from the sharp pain of being rejected. Three long years of struggle had finally overwhelmed her.

    When she was able to cry no more, she became worn out and gave up. It was at that moment that a silent idea came to her: why not offer elderly people home care assistance? Using another talent for computers she printed off some flyers and cards and distributed them to her church, grocery stores and even placed a small ad in the newspaper. Within a week she had procured two new customers. Now, even though she's not a CEO of a major company she feels happy and productive again.

    Before a butterfly can come out of its chrysalis (茧) it has to go through a lot of struggling. Each time it pushes out to escape, acids are being removed from its wings. If someone were to come along and break the chrysalis open for it then the butterfly would die from those acids. Actually the struggle is necessary for the butterfly to survive. Then in the stillness, when the struggle is over, the butterfly can come out and share its beauty with the world.

    We as humans are not any different.

    Most students, when asked about their best graduation(毕业) gift, would probably reply, “ A car”, or “Money for a house”. Cai Kaiyuan, 21, made a difference choice. As a graduation gift to himself, he decided to work as a volunteer teacher in a distant village in Tibet.

    Cai, a student at Huan Railway Professional Technology College, at first planned to cycle from Sichuan to Tibet. It turned out cycling on a plateau(高原) was quite difficult. And it has kept changing his opinion on life. Cai's hands even became painful while cycling up a 5008-meter-high mountain, where temperatures often dropped to 18 below zero. At night, the ice covered the road and he fell off his bike three times. Little oxygen made him feel sick and weak. “At the most serious moment, I felt that was on the line,” said Cai.

    However, he also gained something unexpected. At Ya' an, a city in Sichuan, he met a group of tourists who are also university students. A girl called Wu Ling told him that she planned to work as a in a primary school in Tibet after her journey. He was impressed by the idea as she looked weak.

    It was not until he reached a family-run hotel in Shigatse that Cai's spirits began to rise. The hotel manager's two daughters enjoyed talking with him. The kids asked about his experiences on his trip, and showed him the beautiful local lakes. “They told me that they always liked to talk to guests, as they wanted to improve their Mandarin,” he said, “Their parents and many locals can only speak Tibetan.”

    Cai was moved by the girls' story. Their situation is worse and the local people have little chance to learn Mandarin because the schools are short of teacher. “1 want to do something to improve the situation for kids like them,” said Cai. His parents finally gave their agreement and his teachers also supported him.

    On a cold morning in 2015, five-year-old Lucas stood on the bank of Blue Star River, hugging a dead salmon（鲑鱼）against his thick yellow coat. He looked up at his father, Steve, who nodded encouragingly. "Go ahead," he said. "Put it in." The young boy dragged his feet forward and held the fish as far as he could into the shallow water. "It's floating!" Lucas yelled, delighted. For a moment, it's almost as if the handsome salmon could come back to life.

    Lucas' salmon was just one of 100 or so dead bodies that will land in Blue Star River in a half-hour activity this morning, delivered by dozens of volunteers. None of the salmon will rise from the dead, but Andy, president of the Fish Rescue Society, who has promoted this gathering, is carrying out the resurrection （复活）project of salmon.

    Andy led the group's campaign to recover this urban waterway's salmon population. "The Fish Rescue Society started exploring the possibility of recovering the salmon in the river in the mid-1990s, and they also focused on river recovery in cities worldwide."

    Andy and his group are devoted to giving the river a full make-over. This monumental repair job, supported by approximately $95,000 of funding from the Pacific Salmon Foundation over the past 15 years, has involved recovering the river-habitat of salmon and preventing it from wearing away. Work on the river's final section was completed in October 2016.

    Our cities have never been denser, taller, or busier than they are now, and with that, comes the constant battle for land. But if we look at aerial images of any city center, we can quickly spot plenty of unused space — the rooftops.

    So what can we use this precious resource for? In a growing number of high-density cities, some of it is dedicated to recreation — everything from bars and pools, to soccer pitches and running tracks can now be found atop skyscrapers. But when a rooftop offers access to sunlight, there are two more obvious candidates for its use - agriculture and solar power.

    Green roofs have been growing in popularity for more than a decade, and in some cases, growing in scale too. Green roofs can provide a habitat for birds and insects in an otherwise hostile environment.

    Cities can be several degrees warmer than the surrounding countryside. Green roofs come with the added benefit of mitigating the dreaded urban heat island effect. Trees and green spaces can absorb shortwave radiation, and use it to evaporate water from their leaves — a kind of 'double cooling' effect.

    With food security and urban nutrition ever-higher on the agenda for the United Nations, there's also a worldwide movement of using green roofs for hyper-local food production. In regions with suitable climates, hundreds of different vegetables, fruits, and salad leaves can be grown on rooftops.

    But what about solar power? With so many cities now stopping using fossil fuels, and the costs of solar panels dropping dramatically, PV systems have become the 'go to' option for generating distributed power in built-up areas. And, even with standard commercial panels, the energy gains are dramatic. It is estimated that rooftop PV systems could generate almost 40% of electricity demands nationwide.

    There's no doubt that in both cases, a network of 'productive rooftops' could benefit the local community by supplying a portion of a necessary resource — either food or electricity — while also reducing their environmental burden. But is one better than the other?

    This was the question posed by researchers from MIT and the University of Lisbon in a recent paper in the journal Cities. Focusing on the rooftops of a mixed-use neighborhood in Lisbon, they carried out a Cost-Benefit Analysis. Starting with existing data on everything from installation costs and resources used, to carbon footprint and yield, they modelled the impact that each installation would have on the local community over a period of 50 years.

    And by looking at it that way, they concluded that for Lisbon, the use of rooftops for food production could yield significantly higher local value than solar PV energy generation. Of course, this is very site-specific. There is no one-size-fits-all solution to make cities more sustainable, and anyone who tells you otherwise is massively over-simplifying a complex issue. Now, all I hope is that some of those decision makers start using it.

    Researchers are looking into new ways to generate efficient photovoltaic energy (光伏能源) and for this they have been inspired by the v-shaped posture of the Cabbage White butterfly(菜粉蝶).

    Photovoltaic energy is the science behind solar power, where light is turned into electricity. It is a two-set process. Step one is a photoelectric effect, caused by sunlight. The second step is an electrochemical process, which generates an electric current.

    To improve the collection of sunlight, a research group has been inspired by the resting posture of the Cabbage White butterfly. The species has a natural range across Europe, Asia, and North Africa. To many farmers, the butterflies are regarded as a pest; to others, they are pretty to look at. To one research group the butterflies are an inspiration.

    The butterfly adopts a v-shape in order to heat up its flight muscles before taking off. By creating solar panels(太阳能电池板)in this formation，scientists think that the quantity of power that a solar panel can produce can be increased by around 50 percent.

    The Cabbage White butterfly is different to many other butterflies in using the v-formation. On cloudy days butterflies need to wait to receive enough sunlight in order to fly. However  by using the v-posture, the Cabbage White butterfly is able to take in more energy more quickly than other butterflies. In addition, the butterfly can reflect sunlight from its wings, which allows its flight muscles to be warmed to an ideal temperature.

    The new research was conducted at the University of Exeter's Environment and Sustainability Institute (ESI) and the Centre for Ecology and Conservation. Discussing the findings with Laboratory Manager magazine, lead researcher Professor Tapas Mallick stated :"Biomimicry(仿生学)in engineering is not new. However, this research shows pathways to develop low cost solar power that have not been done before. "