We already know the fastest, least expensive way to slow climate change: Use less energy. With a little effort, and not much money, most of us could reduce our energy diets by 25 percent or more—doing the Earth a favor while also helping our wallets.

    Not long ago, my wife, PJ, and I tried a new diet—not to lose a little weight but to answer an annoying question about climate change. Scientists have reported recently that the world is bending up even faster than predicted only a few years ago, and that the consequences could be severe if we don't keep reducing emissions(排放) of carbon dioxide (CO₂ ) and other greenhouse gases that are trapping heat in our atmosphere.

    We decided to try an experiment. For one month we recorded our personal emissions of CO₂. We wanted to see how much we could cut back, so we went on a strict diet. The average US household(家庭) produces about 150 pounds of CO₂  a day by doing common-place things like turning on air-conditioning or driving cars. That's more than twice the European average and almost five times the global average, mostly because Americans drive more and have bigger houses. But how much should we try to reduce?

    For an answer, I checked with Tim Flannery, author of The Weather Makers: How Man is Changing the Climate and What it Means for Life on Earth. In his book, he had challenged readers to make deep cuts in personal emissions to keep the world from reaching extremely important tipping points, such as the melting(融化) of the ice sheets in Greenland or West Antarctica. "To stay below that point, we need to reduce CO₂  emissions by 80 percent," he said.

    Good advice, I thought. I'd opened our bedroom windows to let in the wind. We'd gotten so used to keeping our air-conditioning going around the clock. I'd almost forgotten the windows even opened. We should not let this happen again. It's time for us to change our habits if necessary.

    Zebra crossings－the alternating dark and light stripes on the road surface－are meant to remind drivers that pedestrians may be trying to get across. Unfortunately, they are not very effective. A 1998 study done by the Department of Traffic Planning and Engineering at Sweden's Lund University revealed that three out of four drivers maintained the same speed or even speeded up as they were approaching a crossing. Even worse, only 5% stopped even when they saw someone trying to get across.

    Now a mother-daughter team in Ahmedabad, India has come up with a clever way to get drivers to pay more attention－a 3-D zebra crossing with an optical illusion (视错觉).

    Artists Saumya Pandya Thakkar and Shakuntala Pandya were asked to paint the crosswalks by IL&FS, an Indian company that manages the highways in Ahmedabad. The corporation was looking for a creative solution to help the city's residents to cross the busy accident-prone  (易出事故的) roads safely. Thakkar and Pandya, who had previously seen images of 3-D zebra crossings that gave drivers the illusion of logs(原木)of wood on the streets in Taizhou, China, decided to test if a similar way would work in India.

    Sure enough, in the six months that the 3-D crosswalks have been painted across four of the city's most dangerous highways, there have been no accidents reported! The artists say that while it may appear that the zebra crossing could cause the drivers to brake suddenly and endanger the vehicles behind, such is not the case. Because of the way the human eye works, the illusion is only visible from a distance. As they get closer, the painting looks just like any other ordinary zebra crossing. The creators hope that their smart design will become increasingly common throughout India and perhaps even the world. So let's look forward to it.

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    I climbed Kilimanjaro with Lava Expeditions (探险队) during the rainy season.

    I flew to Nairobi in Kenya and spent several days there. At my hotel in Nairobi I met the rest of the group with whom I would spend the next week. We all travelled on the bus together for a 6-hour journey into Tanzania and then Arusha, a quiet town.

    After we arrived at our hotel in Arusha, we had dinner and a few drinks. Then we were introduced to more members including Taddeus Minja, the main guide, who was very experienced — climbing Kilimanjaro runs through the generations (代) of his family.

    The next day the Lava Expeditions members checked if we had the correct and enough clothing for our expedition on Kilimanjaro. Only one person needed to bring more clothes.

    After that we set off, walking in the rain through the beauty of the rainforest, all the way to the first camp. I was happy the next few days as the view was so wonderful and changed every day. I suffered a little during the trip and I felt so tired. But the members of Lava Expeditions provided me with lots of encouragement, which was one of the best memories. Finally we reached the top of Kilimanjaro in bright blue skies.

I felt excited about climbing Kilimanjaro and the feeling didn't change during my trip. Lava Expeditions looked after me so well that I was deeply thankful for their help.

    More than 90 years has passed since Hollywood's official film organization first proposed plans to build its own museum. Those plans are finally becoming a reality, with the Academy Museum of Motion Pictures set to open in 2019.

    The project is underway at the site of a historic Los Angeles department store built in 1939. Museum officials say visitors will be able to “experience the magic of cinema” by learning about all parts of the film-making process.

    Film historian Kerry Brougher has been named directors of the museum. Brougher says the museum will include 12 million photographs and 80,000 screenplays as well as props（道具）, costumes and other objects from famous films. The Academy Museum will also feature Oscar statuettes（小雕像）donated by actors who won the awards.

    Brougher says the museum is designed to make visitors feel like they are in a movie, too, with many interactive experiences. “You won't necessarily know what's coming next, '' he adds. “You'll be in environments sometimes that make you feel like you've gone back to the past and that you're in the area that you're actually exploring.” He adds that visitors may even get the chance to walk down a red carpet and accept their own Academy Award.

    Currently, Hollywood only has a few possibilities for visitors. They can go along the Walk of Fame and visit movie studios or see the Dolby Theater, where the Oscars are presented. But beyond these, movie fans have limited possibilities.

    Eric Garcetti, the mayor of Los Angeles says the Academy Museum will provide visitors the chance to experience many different parts of the film industry all in one place. Garcetti notes the museum will also serve the hundreds of thousands of local people working in film-related businesses. He says they, too, will finally be able to visit a place that celebrates their own Hollywood movie industry.

    Environmentalists said our planet was bound to die. Now one man says they are wrong. “Everyone knows the planet is in bad shape,” thundered a magazine article last year. “Species are being driven to die out at record rates, and the rivers are so poisonous that fish are floating on the surface, dead.”

    But there's growing belief that what everyone takes for granted is wrong: Things are actually getting better. A new book is about to overturn our most basic assumptions about the world's environment. Rivers, seas, rain and the atmosphere are all getting better.

    The total amount of forests in the world is not declining. The Skeptical Environmentalist by Bjorn Lomborg, professor of statistics at the University of Aarhus in Denmark, is an attack on the misleading claims of environmental groups, and the “bad news” culture that makes people believe everything is getting worse.

    Now the attacks are increasingly coming from left-wing environmentalists such as Lomborg, a former member of Greenpeace. The accusation is that, although the environment is improving, green groups — with profits of hundreds of millions of pounds a year — are using scare tactics (战术) to gain donations. Lomborg's book doesn't deny global warming — probably the biggest environmental threat — but destroys almost every other environmental claim with many official statistics.

    The Worldwatch Institute claims that deforestation(采伐森林) has been speeding over the last 30 years. Buy Lomborg says that is simply rubbish. Since the dawn of agriculture the world has lost about 20% of its forest cover, but in recent decades the forest area's depleting has come to a stop. According to UN figures, the area of forests has remained almost steady, at about 30% of total land area, since 1940s. Forests in countries such as the US, UK and Canada have actually been expanding over the past 40 years. Despite all the warnings the Amazon rainforest has only shrunk by about 15%.

    Nor are all our species dying out. Some campaigners claim that 50% of all species will have died out within 50 years. But other studies show only 0.08% of species are dying out each year. Conservation efforts have been successful. Whales are no longer threatened and the bald eagle is off the endangered list.

    Environmental groups claim that many of the improvements are the results of their campaigns. Stephen Tindale, director of Greenpeace UK, said, “There are important examples, such as acid rain and ozone, where things weren't as bad as predicted, and that's because our behavior changed.”