National parks are large areas of public land. They give a safe home to local plants and animals. They help keep the air and water clean. They also give us the best trips. Today, there are about 7,000 national parks around the world. Forbes has listed 12 of the most beautiful ones in the world that will surprise you with their amazing landscape, geographic wonders and colourful plants and animals.

    The Grand Canyon National Park of the US is one of the natural wonders of the world. It is best known for its size and depth. It is 446 kilometres long, up to 29 kilometres wide, and 1.6 kilometres deep. The immensity of the canyon makes people feel they are very small. Every year, about 5 million people visit here. Taking a tour in the South Rim offers visitors the park's full views, while the North Rim shows beautiful wild flowers

    If you love animals, you'll like the Serengeti National Park in Tanzania. The "Big Five" live here. They are the lion. African elephant, African leopard, rhinoceros and African buffalo. The name "Big Five" came from the five animals that were the hardest to catch. Now they are what people most want to see in the wild. If you visit the park, you should never miss the migration (迁徙) of over 1.5 million wildebeest (牛羚) and 250,000 zebras every year. This is the most famous site of the park.

    When throwing away rubbish, do you know which Bin it should go in? Have you ever noticed the differently-colored Bins on the street?

    Some of you might not be able to answer this question. However, it's actually quite important to know how to sort your waste. Not knowing how to sort waste can make it harder to save energy and protect the environment.

    If you don't sort your waste, all of it will go to a landfill and Be Buried(埋) together. These landfills can take up large areas of ground that could have Been used for planting trees or Crops. The electronic waste you throw away, such as Batteries, Can pollute the soil and groundwater. Other pieces of waste, like the metal part of a pen, can be used to make other things if they are properly recycled.

    With this in mind, many Cities in China have Been running waste-sorting Campaigns (活动)in recent years. For example, Shanghai announced in July that within three years, all of its residents(居民)should sort their waste into four groups wet, recyclable, harmful and dry.

   "Wet" waste is also known as household waste." They are things you don't want but that pigs can eat," Guangzhou Daily explained. Paper, metal, glass and other things that Can Be reused are recyclable waste.

    Harmful waste includes things like medicine, Batteries and fluorescent Bulbs. Finally, any waste that's not wet, recyclable or harmful will go in the" dry waste" bin.

    Many other Chinese Cities, including Shenzhen, plan to use this method to sort their garbage. Now that you know this, perhaps you can do your part to protect the environment and encourage others to sort their waste.

    Here is a page from a magazine called Future. Read the following information about things that may happen in ten years.

    Cars will run on solar power (太阳能) and will be much cleaner. They will be much safer. For example, if you are too close to another car or if you are driving dangerously, your car will slow down or stop by itself.

    New cities will have to be built in the sea. Some cities on water will have two levels(层). People will live on the upper level; the lower level will be used for traffic, shops and factories.

    Biotechnology(生物技术) will make food better and healthier. Plants without insects or illnesses (病虫害) will be developed. The taste of fruit and vegetables will be better and food will be kept longer.

    Many new ways to cure(治愈) illnesses will be found. People will use products of genetic engineering (基因产品) to cure more illnesses. However, some new illnesses will appear.