Do you think you're green? You're a totally modern citizen, aren't you? You keep your bottles and take them to the bottle bank. You have a black bin and a green bin, one for general waste and one for recyclable waste. Your car uses lead—free petrol. You use the same plastic bag every time you go to the supermarket. Maybe you even cycle to work from time to time. You are playing your part; you are green and environment—friendly. Well, I've got news for you:

    YOU ARE NOT DOING ENOUGH!

    If you don't believe me, look at these facts. Trust me, they're from a BBC website.

    On average every person in the UK throws away their own body weight in rubbish every seven weeks.

    Every year, the average dustbin contains enough unused energy for 500 hot baths, 3,500 hot showers or 5,000 hours of television.

    Every UK household produces over one tonne of rubbish every year.

    If all the aluminium drink cans sold in the UK were recycled, there would be 14 million fewer full dustbins per year.

    Just one recycled aluminium can saves enough energy to run a television for three hours!

    At Christmas over 83 square kilometres of wrapping paper is thrown in the bin.

    Almost three billion nappies (used for baby) are thrown away in the UK every year. 90% of these are buried and take hundreds of years to disappear.

    Have I made you believe that you need to do more? No? OK, here are one or two more facts.

    Recycling just one plastic bottle saves enough energy to power a light bulb for six hours.

    Collecting dustbins and cleaning streets costs ￡1. 6 billion per year.

    Surely you must believe me now. You need to do more. The good news is that there is some— thing else you can do.

    The spring season brings warm weather, flowers and other changes for people to enjoy. For some restaurant cooks, the most exciting spring arrival is ramps.

    Ramps are a wild plant in the eastern mountains of North America. They are one of the first plants that grow in the spring, usually between April and May. They are recognized(意识) by their red stem(茎), and two long and wide green leaves. They are also famous for their strong taste, similar to onions(洋葱).

    Ramps are not as well-known as other vegetables, but they have a long history in the United States. In the Appalachian Mountains, ramps have been an important food for a longtime. During spring, it is common for small towns in the Appalachian area to hold large ramp dinners for the community.

    However, over the last 30 years, ramps popularity has grown quickly. They are now a highly-desired vegetable for many nice restaurants in cities like New York and Washington D.C.

    One reason the plant is popular is that it grows in the wild. It is difficult to grow them on farms. Most restaurants get them from foragers, who collect ramps by searching forests for some small pieces of land where they grow. Ramps have a short season. Within a few weeks of full growth, the plant is done for the year. This shot life is some reason for their popularity.

    And that popularity could lead Io their disappearance from Earth. In 1995, the local government in Quebee, Canada, stopped people selling the plant to businesses in order to protect the plant against being over-dug.

    The season is short, but it has not ended yet. If you are in the right place, you still have time to try a taste of ramps yourself.

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    You and I can tell one face from another easily, but can computers do the same with few mistakes? At an earlier time, many thought it was impossible, but progress in facial recognition(识别)software has made it come true. Technology is quickly catching up with the human ability to read faces.

    Some facial recognition systems use a digital picture and measure(测量) different points on the face. Measurements include the distance between the eyes, the width of the nose, the length of the jaw(下巴) line and more. A detailed map, or faceprint, of the face is developed, stored and later used as a basis for comparison and matching.

    Some government agencies, airports and banks use facial recognition technology for safety purposes. Apple and Facebook use it to provide their users with added convenience. For example, Apple's new iPhone is expected to use it to unlock the home screen. Other companies use it to help them in better recognizing their customers' needs. For example, some stores are checking into the use of the technology to catch sight of return customers. Then they can offer special deals, based on the customers' buying habits.

    In America, facial recognition is used by universities to check students' attendance. This year Welsh police used it to catch a terrorist outside a football game. In China it checks on the identities of ride-hailing drivers, permits tourists to enter some places of interest quickly and lets people pay for things with a smile.

    While some systems are used with the knowledge of the persons, others aren't, and that raises worries. For many people, however, convenience outbalances the worries, in other words, meaning that facial recognition technology is likely here to stay.

    Many people like to travel by plane, but I don't like it because an airport is usually far from the city. You have to get there early and wait for hours for the plane to take off and it is often late. You can't open the window. You can't choose the food. Planes are fast, but it still takes hours to get out of the airport and into the city.

    I like traveling by train. I think trains are safe. Railway stations are usually in cities. When you are late for a train, you can catch another one. You can walk around in the train and open the windows. You can see many interesting things on your way. I know it takes a little more time.

    I also like cars. You can start your journey when you want to, and you don't need to get to a railway station or a bus stop. Also you can take many things with you in a car. But sometimes there are too many cars on the road.