If two scientists at Los Alamos National Laboratory are correct, people will still be driving gasoline powered cars 50 years from now, giving out heat-trapping carbon dioxide(二氧化碳) into the atmosphere—and yet that carbon dioxide will not contribute to global warming.

    In a proposal by two scientists, vehicle emissions(排放) would no longer contribute to global warming. The scientists, F. Jeffrey Martin and William L. Kubic Jr., are proposing a concept, which they have named Green Freedom, for removing carbon dioxide from the air and turning it back into gasoline.

The idea is simple. Air would be blown over a liquid solution of potassium carbonate, which would absorb the carbon dioxide. The carbon dioxide would then be put to chemical reactions that would turn it into fuel(燃料): gasoline or jet fuel.

    This process could change carbon dioxide from an unwanted, climate-changing pollutant into a vast resource for renewable fuels. The cycle—equal amounts of carbon dioxide produced and removed—would mean that cars, trucks and airplanes using the synthetic(合成的) fuels would no longer be contributing to global warming.

    Although they have not yet built a synthetic fuel factory, or even a small model, the scientists say it is all based on existing technology. “Everything in the concept has been built, is operating or has a close cousin that is operating.” Dr. Martin said.

    The Los Alamos proposal does not go against any laws of physics, and other scientists who have independently suggested similar ideas. Dr. Martin said he and Dr. Kubic had worked out their concept in more detail than former proposals.

    There is, however, a major fact that explains why no one has built a carbon-dioxide-to-gasoline factory: it requires a great deal of energy.

    According to their analysis, their concept, which would cost about $5 billion to build, could produce gasoline at an operating cost of $1.40 a gallon and would turn economically practical when the price at the pump hits $4.60 a gallon.

    Other scientists said the Los Alamos proposal perhaps looked promising but could not evaluate it fully because the details had not been published. “It's definitely worth pursuing,” said Martin I. Hoffert, a professor of physics at New York University. “It's not that new an idea. It has a couple of pieces to it that are interesting.”

    Here are some ways parents can use to encourage a healthy self-image in their children.

    Teach what real value is. I think kids sometimes are confused about values. How valuable you are is not measured by how pretty you are on the outside.{#blank#}1{#/blank#}We were watching the Oscars and my 6-year-old son said, “She is so pretty,” and then quickly looked at me and said You are prettier, Mom.” And I said, “It's okay. There are many people prettier than me on the outside. I know that's not why you love me{#blank#}2{#/blank#}

    Tell your kids about “the grass is always greener” syndrome. It is very easy for all of us to see the charm, whether it is in a famous singer or the most popular girl in the school. Do not think too highly of famous people.{#blank#}3{#/blank#}Maybe they have the same struggles, like wanting acceptance from peers.

    {#blank#}4{#/blank#}Don't be afraid to have conversations with your child about how they're feeling about ads songs, etc. You are the parent!{#blank#}5{#/blank#}Take a stand and have confidence enough not to be followers and not to purchase clothing, music, or magazines that you don't believe send the right message to your children!

A. Use your mouth.

B. Be patient with your kids.

C. about what problems they might have.

D. It is important to teach children this from an early age.

E. Success is not measured by how famous you are, either.

F. Girls tend to like famous singers while boys prefer sports stars.

G In fact, kids of all ages want and need boundaries from you.

    As he applied sunscreen to his young daughter's face, Dara O'Rourke, a professor of environmental and labor policy at the University of California, Berkeley, found himself wondering if the lotion(霜) was safe. He realized there was no readily available answer. The result—two years, a team of chemists, lots of testing and venture capital(风险投资) later—is GoodGuide. com. Launched in 2008, this is a website with a smart phone app that rates 140, 000 consumer products (only in America) according to their safety, environmental sustainability and the ethics of the firms that make them. Now GoodGuide has created a new “purchase analyzer” app designed to inform consumers not just about the values attached to products, but also about whether they are the virtuous(有信誉的) shoppers they say they want to be.

    Using the new app requires selecting a series of characteristics, which range from whether the user favours organic products to buying only from firms with a good human-rights record. Consumers then scan the bar code on a product with the camera in their smart phones. The app identifies it and checks in a database to score it. Much therefore depends on the quality of the data, which GoodGuide gathers from various sources, including government reports, scientific studies, and research by its own staff. If the product scores badly, the app will recommend an alternative item which is rated more highly. The app also tracks a consumer's purchases to see how well he lives up to his selected values, giving a sort of personal virtue rating.

    So far, GoodGuide has mostly been used by shoppers who are keen to know about any issues connected with products they buy. They are mothers concerned about a child's health, older people facing a chronic(慢性的) illness or supporters of a cause, such as animal rights. The hope behind the app is that the idea of finding out about a product's background will become the mainstream.

    Consumers rarely change their buying habits, even when provided with scientific and other data, says Mr O'Rourke. So he has drawn on insights from behavioral economics, which show shoppers can be greatly influenced by peer pressure and by information passed on to them by people they know. The app tries to take advantage of these pressures. The virtue rating will inform consumers how well they are doing according to the values they espouse(拥护). That measurement encourages them to do better. Soon, the rating will be able to be shared with others on social media sites such as Facebook, which could inspire a shopper to consume more thoughtfully.

    {#blank#}1{#/blank#} I say this a lot because it's important: you need to walk more. There are a few main reasons why I'm so fond of walking, also known as moving frequently at a slow pace.

    {#blank#}2{#/blank#}

    Walking might not be as effective as other forms of exercise, but frequent walking will help anyone with two functioning legs that allow movement who would otherwise meld into the couch lose some body fat.

    It's good for your brain.

    Walking does much more than work the area underneath your neck. The farther an older person can walk in six minutes, the better he or she performs on memory and logic tests. Folks who perform poorly on the walking test tend to have reduced grey matter volume in certain sections of their brains.

    It reduces stress.

    {#blank#}3{#/blank#} Go for a walk, preferably in a natural setting. For me, it's the beach of the Malibu hills. For others, it might be the woods or even a park.

It prevents falls in the elderly.

    Walking on uneven, natural ground like hiking trails， improves balance and reduces falls in the elderly. {#blank#}4{#/blank#} The earlier you start habitually walking, the better your ability to navigate the land without falling will be.

    It gives you a chance to think.

    When we walk, we think. And because walking is a low-difficulty effort, we can direct our executive functioning to more internal matters. We work through problems, come up with ideas, replay conversations, scheme, and discover solutions. {#blank#}5{#/blank#}

A. It modestly reduces body fat.

B. It lowers blood pressure, especially after meals.

C. Don't wait until you're already at risk of falling, though.

D. What do I do when I need to get away from a particularly stressful day?

E. Try to keep the walk as close to the meal as possible to aid in weight loss.

F. Even though some of you may be tired of me saying this, it needs saying.

G. Or maybe we just think about that funny dog we saw on the way to work the other day.

    Our mother earth is going through a very tough situation and we, the entire human race, are destroying our environment or unconsciously without even realizing its consequences. Now we have to act very smartly and plan something to sustain what we still have, getting all necessary support from nature to lead healthy lives.

    Gardening is always an excellent and environmentally friendly idea. If you can go for sustainable gardening, then it will be even more useful for all. Gardening is a favorite hobby for many. It is time to channelize your hobby towards a more meaningful motivation.

    When we do gardening we need to use different ingredients (材料) to grow plants. Some of them are natural resources like water, soil, sunshine, and many things like this. Using these resources smartly is a part of sustainable gardening. Some simple techniques include: use less water and organic things to grow plants; try to store rainwater so that you can use them for gardening; try using less energy to drive devices; avoid using plastics in any form while gardening; reuse the leaves from your garden to fertilize them. These are the basic sustainable measures. To do so we need to have proper knowledge about gardening and its requirements so that we can use proper resources without wasting any of them.

    In today's busy life we don't get much time to spend on our environment. Gardening gives us a chance to do so. We can also have some pesticide-free (无农药的) and fresh food if we grow them in our garden. This is the right time to do some good to protect our own environment and gardening is one of the easiest ways. Do you want to start gardening, but you're not sure how? Click here: http://www.gardenhowto.com.

    A Japanese telecom company has designed a robot that it says has emotions (情绪). But rather than run in fear from it, we've welcomed it into our homes: Pepper, the "emotional robots" sold out within a minute of going on sale.

    Created by Aldebaran Robotics and Japanese mobile giant SoftBaok, Pepper went on sale to the general public in Japan on June 20. It is "the first humanoid (类人的) robot designed to live with humans, " Aldebaran says on its website. Pepper costs about $ 1, 600. And like all good mobile products, there's a $ 120 per month data fee, as well as an $80 per month damage insurance fee. According to a news report, Pepper can pick up on human emotions and create his own using a "multi - layer neural (神经的) network." Pepper's touch sensors and cameras are said to influence its mood, which is displayed on the tablet-sized screen on its chest.

    Pepper will sigh when unhappy, and can go around your house recording your family's daily activity. Aldebaran says Pepper can feel "joy, surprise, anger, doubt and sadness," but it doesn't say how strongly it can feel these emotions. What happens when Pepper is having a bad day? Will it, like many humans, become uncooperative? Will it ask for some time alone? What happens if it knows that its purpose in life is just to take part in small talk? Thankfully, Pepper is only about four feet tall, with roller balls instead of legs, so if it is angry with and even turns on its owners, you'll be safe if you can make it upstairs.

    Aldebaran says in reality, they're probably quite a few years away from artificial intelligence that could create real emotions. Aldebaran wasn't immediately able to tell when Pepper will be available out of Japan, but additional sales are scheduled for July after the first 1, 000 units sell out. SoftBank currently uses the robots in its stores as greeters, and it plans to offer Pepper to other stores in the future. Hopefully "boredom" is not an emotion Pepper can feel.