Pound for pound, healthy food is cheaper than junk food, according to a new research from the U. K.

    The Institute of Economic Affairs found that the average cost for a “wide range” of healthy foods was about £ 2 per kilogram, compared with £ 3 a kilogram for less-healthy products such as processed and ready-made foods.

Still, study after study finds that cost is often a barrier when it comes to healthy eating. Convenience drives consumers to care about habits more than prices, the U. K. study concluded. Taste and convenience often play a larger role in people's food choices than price or nutritional quality.

    “Processed foods are extremely expensive, especially when it comes to the nutrient value. Some of the healthiest, most inexpensive foods aren't so attractive. Beans cost next to nothing, especially when bought dry and in great amounts. They take time and some skills to prepare. ” said Ciara Foy, a nutritionist.

    Instead, busy parents reach for the chicken. “You might be getting something that has enough calories to fill you up but you're actually not getting any nutrients, so your body's going to keep wanting more and more food,” said Foy. “And that's why in North America we, re overfed and undernourished (营养不良的).”

    Makers tend to try to promote their product based on perceived health benefits, which makes consumers confused at times with what is a healthy product and how much you should pay for those benefits. The most expensive items, healthy or not, are the ones that end up in the trash. “A lot of people waste a lot of food,” Foy said. It's estimated that more than $ 30 billion of food is wasted in Canada every year. Foy recommends taking a look in your fridge to see what needs to be used up when planning for the next night's meals. “If you actually cut down on the waste you'll find that you can afford healthy food,” Foy said.

    A company in San Francisco, California, has found a way to turn used plastic bottles into women's shoes.

    Every day, millions of Americans drink water and other liquids from plastic bottles. More than 60 million of them are thrown away each day. Many of the plastic bottles end up in landfills or are burned with other waste products.

    A San Francisco start-up company called Rothy's, however, turns this plastic waste into environmentally friendly shoes. Roth Martin is the company's co-founder. He explains how they turn plastic into soft material for women's feet. They take the plastic, clean it, and break it down into small pieces. Then they press them through a device that makes soft fibers. Those fibers are then combined together. This is done by a 3D machine. It is designed to reduce waste while making the shoes. The knitted stuff and the inner part of the shoe are then attached to the shoe's outer part, called the sole. This outer sole is also made from environmentally friendly material: responsibly sourced no-carbon rubber.

    Rothy's shoes are sold online. They are flat shoes, with either a rounded or pointed toe. They come in different colors and designs. They cost either $ 125 or $ 145 per pair, depending on the design. After American actress Gwyneth Paltrow discovered them last year, the demand for the shoes grew. Martin says there is no shortage of material to fill that demand. "We're not going to run out of water bottles any time soon. So we have a limitless supply of material, and I think that is a good sign for our future." When the environmentally friendly shoes wear out, customers can return them at no cost to a company that uses the recycled material to make other products.

    For now, the shoes are only available to be shipped in the United States. However, the company says it will add international shipping in the near future.

Eco-Resort Management

    Ecotourism is often regarded as a form of nature-based tourism and has become an important alternative source of tourists. In addition to providing the traditional resort-leisure product, it has been argued that ecotourism resort(度假村) management should have a particular focus on best-practice environmental management. Couran Cove Resort is such a tourist attraction located on South Stradbroke Island, Australia.

    Sustainable(可持续的) Practices of Couran Cove Resort

    South Stradbroke Island is separated from the mainland by the Broadwater, which is home to a wide range of plant communities. Located on the offshore island, the Resort is only accessible by means of water transportation. It provides hourly ferry service from the harbour on the mainland to and from the island. Within the Resort, transport modes include walking trails, bicycle tracks and the beach train. The reception area is the counter of the shop which has not changed in 8 years at least. The accommodation is an octagonal(八角形的) building. These are large rooms that are clean but the equipment is old and in some cases just working. The ceiling fan only works at high speed for example. Beds are hard but clean. There is a television, a radio, an old air conditioner and a small fridge in each room.

    As an ecotourism-based resort, most of the planning and development of the attraction has been concentrated on the need to co-exist with the natural environment of South Stradbroke Island to achieve sustainable development.

Water and Energy Management

    There is groundwater at the centre of the island, which has a maximum height of 3 metres above sea level. The water supply is recharged by rainfall and is commonly known as an freshwater aquifer(含水层). Couran Cove Island Resort obtains its water supply by tapping into this aquifer and collecting it through a pipe. In order to narrow the water uses, all laundry activities are carried out on the mainland. The Resort uses LPG power station rather than a fuel oil station for its energy supply, supplemented(补充) by wind power, which has reduced greenhouse emissions by 70%. Hot water in the eco-cabins and for some of the Resort's vehicles is solar-powered. Water efficient fittings are also installed in showers and toilets. Visitors who stay at the Resort are encouraged to monitor their water and energy usage by an in-house television system, and are rewarded with prizes (such as a free return trip to the Resort) accordingly if their usage level is low.

    Evaluation

    In three years of operation, Couran Cove Island Resort has won 23 international and national awards. It has effectively implemented contemporary environmental management practices. However, the Resort's growth will eventually be limited by its carrying capacity, and quantity control should be incorporated in the management strategy of the Resort.

    Many high school students consider a college education useless. Therefore, they choose not to go to college. If you're one of them, think again. Here are some reasons why you should go to college and receive a good education there.

    Schools and universities are the first sources of knowledge. We take that knowledge later on to build our careers after graduation. More knowledge will be gained after you start working, but without an education, that job will not be within easy reach. Knowledge leads to knowledge.

    While limited within the walls of the educational institutions, we openly explore other cultures of the world. We come to know that ours is not the only culture. Other cultures have valuable insights to share, enriching our own Education also makes us want to travel and interact with various cultures, broadening our horizons.

    When there's a downturn in the economy, those who attended college will be more likely to find a new job than those who only finished grade school and have a limited skills set. The more education you have, the more chances you will get to improve the quality of your life as you have a better job and earn a higher salary.

    When you're skillful and knowledgeable, you get to "rub knees" with people of similar backgrounds and tastes. It means a good education leads to excellent networking. Good networking can benefit you a lot in your later life.

    A good education makes you a more interesting person. You can talk about ideas and events instead of just other people and what's on sale in stores. An educated person doesn't gossip, having a preference to discuss ideas and listen to what other people have to say.

    Many seniors feel pressured to go straight from high school to college, but Camden Olson, who graduated from the Latin School of Chicago in the US last year, didn't give in. She decided to spend a gap year-taking a year off before college-raising a guide dog for Guiding Eyes for the Blind in Maine. The non - profit provides trained guide dogs to blind and visually - impaired (视力障碍的) people. "This is something I've always wanted to do." Olson said.

    It is becoming more and more popular among American teenagers to have a gap year. Some students use the year off to figure out what they want to do: travel the world or save money for college.

    Olson is using her time to follow a passion she's had since 7th grade. For years, she kept an eye on guide dog services until she came across the opportunity at Guiding Eyes. With support from her friends, family and teachers, Olson went for it. Olson's volunteer work centers around Derby, a one-year-old black dog.

    "My job is to raise him to be well-mannered and socialized," she said. "Guide dogs can't be distracted. They go everywhere with their visually-impaired owner. They give a blind person a lot of support, too."

    Of course, there's an end in sight for Derby and Olson's close bond. When Derby celebrates his own graduation, Olson will have to say goodbye to him.

    "No doubt there will be tears, but, if he passes, I will be so happy for him to become a working dog," she said.

    While some do not agree that gap years are a good choice, Olson said she's seen major success. In fact, she'll be attending Princeton University soon and is thinking about majoring in biology.

    "I think I'm already so much more mature than I was," she said. "So many kids come back from gap years a lot more focused and prepared."

    Sweet potato plants don't have spines or poisons to defend themselves. But some have evolved a clever way to let hungry herbivores (食草动物) know they aren't an all-you-can-eat buffet, a new study finds. When one leaf injured, it produces a chemical that warms the rest of the plant and its neighbors to make themselves inedible (不宜食用的)to bugs. Sweet potato breeders could potentially engineer plants to produce the chemical as an all-natural pest defense.

    Plant ecologists led by Axel Mithofer of the Max Planck Institute for Chemical Ecology in Jena, Germany, started to look into sweet potato (Ipomoea batatas) defenses after they noticed something interesting about two varieties of the plant grown in Taiwan: The yellow-skinned, yellow-fleshed Tainong 57 is generally herbivore-resistant, but its darker orange cousin, Tainong 66, is plagued (造成麻烦) by insect pests.

    To find out why, the team offered up Tainong 57 and 66 plants to hungry African cotton leafworm caterpillars (毛虫).Both plants released at least 40 airborne compounds as the caterpillars snacked on their leaves. But Tainong 57 produced a lot more of a chemical called DMNT, which has a very distinct smell, the team details this month in Scientific Reports. ("The smell is not nice," Mithofer says. "You wouldn't want it as a perfume.")

    DMNT isn't a new compound; researchers have isolated (分离出) the smelly chemical from other plants such as corn and cabbage, and it is known to induce defense responses in some species.

    To determine whether this was happening in sweet potatoes, scientists set up two experiments. First, they put two plants next to each other and wounded one so it produced DMNT. Then, they exposed healthy Tainong 57 plants to DMNT they had synthesized (合成).In both cases, the DMNT caused the exposed plants to produce more of a protein called sporamin in their leaves. (Tainong 66 did not have the same reaction.) When the caterpillar's snack on sporamin, "they immediately stop eating because they don't feel well," Mithofer says.

    Sporamin is the main protein in sweet potato tubers (块茎),and is indigestible raw, which is why sweet potatoes must be cooked for humans to enjoy them. "If the caterpillars could cook it, they could eat it," Mithofer says. Theoretically, he says, sweet potato breeders could use genetic engineering to make different varieties of sweet potato produce as much DMNT as Tainong 57, and display the same defense responses.

    Still, the research isn't ready for prime time, cautions plant ecologist Martin Heil. DMNT might work in the lab, but in the field, airborne chemicals can be "blown away in seconds," says Heil, who studies plant-insect interactions at the National Polytechnic Institute in Irapuato, Mexico.

    Mithofer himself has no plans now to create genetically engineered sweet potato plants, because they would not be a viable (能活下去的) crop in Europe, where genetically modified crops are outlawed. So for now, Tainong 66 will have to put up with being a caterpillar salad bar.