Some days, don't you think, "Wouldn't it be nice if the laundry would just do itself?” Self-cleaning clothes may sound crazy. But Australian researchers have found a way to make something like this possible!

    A team at RMIT University in Melbourne, Australia, found a way to put special nanostructures (纳米结构) into clothing, which can then clean the clothes. When sunlight hits the nanostructures, they break down the dirt and stains (污渍) that don't belong on your clothes.

    The nanostructures don't break down the actual clothing because cotton and the other clothing materials are too strong to be broken down. According to CNN, the researchers cover the clothing in a solution made of silver and copper (铜) nanostructures. All it takes is 40 minutes of sunlight and your clothes will look as good as new.

    So if you spill on yourself during lunch, you can step outside for a walk, and it will be clean by the time you go inside. It not only makes your life easier, but it can also be good for the environment.

    According to the US Department of Energy, the average load of laundry uses about 25 gallons (about 94 liters) of water. Water is a very important resource, so using less of it to wash clothes is better for the environment. But one of the scientists at RMIT University knows more needs to be done.

    “There's more work to do before we can start throwing out our washing machines,” said Dr Rajesh Ramanathan, “but this is a strong foundation (基础).”

    So what's the next step? Ramanathan wants to either start selling the solution by itself or convincing (说服) clothing makers to treat the clothing with the solution while clothes are being made.

    Have you ever heard of e-waste(electric waste,电子垃圾), which can be produced every day? How do you deal with your computers, MP4 players and mobile phones when they're broken or you want a new one?

    Most people just throw them away. With the development of electric industry, e-waste pollution has become a serious problem. According to the United Nations, in 2014, people around the world produced 41.8 million tons of e-waste and only recycled 6.5 million tons. The US was the biggest waster, producing 7.1 million tons. China came second, with 6 million tons.

    It's important to pay attention to e-waste. It can either be valuable or harmful（有害的）, depending on how we deal with it. E-waste is a valuable urban mine（城市矿藏）. The value of the metals, like gold and silver in the waste around the world, is amazing. And the metals can be reused. But if people throw them away, the toxic chemicals（有毒化学物质） can get into the earth or air,effectingthe environment and people's health.

    Apple, for example, now recycle people's used products in China when they are buying new ones. The company will test and repair the used ones and sell them at lower prices. To help reduce（减少）e-waste, we can also take computers and phones to see if companies offer recycling programs.

    People worldwide are doing something to protect the earth. As kids，we can also try our best to help. We can do the following.

    ●Change a light. Change a regular light to a more energy-efficient(节能的)light.

    ●Drive less. Walk, ride or use public transportation. Ask your parents to drive less. By this way, we can make less pollution.

    ●Recycle more. Think before you throw away trash. Throw trash into different trash cans, and this helps recycle.

    ●Use less hot water. It takes a lot of energy to heat water like a bath instead of a shower, and wash clothes in cold or warm water.

    ●Adjust(调节)your air-conditioning. Move it down 2℃ in winter and up 2℃ in summer than you want it to be. This helps save electricity.

    ●Plant a tree. Any tree can take away one ton of CO₂ through its lifetime.

    ●Turn off the electricity. Remember to turn off your TV, and cell phone charger(充电器)when not in use.

    This will help save electricity and reduce CO₂.

    Would you like to go to the zoo at night? Last month, Shanghai Wild Animal Park opened its night safari(夜间观赏)for the first time. You can see animals in the dark. Some animals enjoy the night—they are nocturnal(夜行的)animals. Who are they?

Many Chinese people used to greet each other with "Have you had your meal?" to show their friendliness. 

Recently, a 1 greeting has appeared in many Chinese cities, "Have you lost weight?"

Chen Xin is a manager of a media company in Hangzhou. He has 2 his friends after successfully getting thinner. "Following instructions from my personal doctor, I went on a diet and 3 10 kg," Chen said with a satisfied smile. 

"I used to eat a lot of unhealthy food, which brought me much 4 . My body indicators (指标) used to be far higher than normal levels," Chen said. "Now my indicators are dropping and becoming normal. And 5 can feel that my body is in good condition again."

Chen is not 6 . Many Chinese are also troubled with "diseases of affluence (富贵病)". This is because the quality of life for most people has 7 improved in the past years. Most people no longer need to worry about 8 they have enough food. And more and more people begin to 9 if they have a healthy diet. 

Healthy diet is important. Besides, many people think that it is 10 if they only control their food intake to lose weight. Exercise is also of great importance.