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    We humans produce a lot of waste every day．We pour it onto the environment．This waste often gives off gases and dusts into the air．Often．it is harmful both to nature and to our human life．

    Do you know one of the main causes of the large amount of dangerous waste? It is people who do not realize how big a problem it is．Because it can be simply removed and sent to a landfill(废渣填埋场)．The problem is often believed to end there．In addition，industries are not willing to find ways to deal with the dangerous waste．They think it will cost money．Many industries and governments build simple landfills to store waste．They often just pour waste chemicals into nearby bodies of water．Often，the chemicals used for industrial production cause dangerous forms of waste．The amount of these chemicals has increased greatly in the past．It is often difficult and expensive to get rid of them．It is also hard to store them in a safe way．

    Every year, major health problems result from dangerous waste．Sadly, often only after someone has died or become seriously ill，and then the governments will take measures to reduce the levels of harmful waste．

    Some governments have realized how serious the dangerous waste problem is．They are now trying to solve this problem．They are also trying to limit the amount of waste industries．

    Not only governments but ordinary people must work together to solve the problem．We can choose not to buy those products which produce dangerous waste．Many scientists think waste can be reduced at least one third by using technologies and methods．

    Climbing Mount Qomolangma, the World's highest mountain, has now become more difficult. The government of Nepal asks climbers to come down the mountain with at least 18 pounds of garbage. That's the average amount of garbage a climber leaves behind on Mount Qomolangma.

    Climbers would leave garbage along the way. This helps climbers keep their bags light, so they would have energy to reach the summit.  The garbage problem in Mount Qomolangma is not new. In 2013, climbers carried down a total of four tons of garbage.

    The new rule came into effect in April of 2014. To make sure it is followed, climbers will have to hand in some money to the officials before they climb the mountain. When they climb back down the mountain, the officials will check them to make sure they bring down the 18 pounds of garbage. If they do, their money will be given back to them.  If not, climbers won't get their money back. Also, the officials won't let these people climb the mountain again.

    China's first artificial intelligence (AI) textbook series designed for primary and secondary school students is expected to be introduced into hundreds of campuses across the country in 2019. The textbooks will be used for elective courses or as part of school﹣based curriculums.

    Significant progress is being reported in China in AI technological research and development, with authorities now moving to promote AI﹣related education.

    According to the publisher, East China Normal University Press, the series will have 10 volumes, with six volumes published so far. Each has its own theme, with 12 to 14 main chapters and 2 to 4 chapters of activities. This series covers the educational demands of students from primary school to high school on AI and provides a systematic framework of AI knowledge.

    The books have been used in three schools in Shanghai as a pilot program and well received by students, according to Wang Jiqing, chief editor of the series.

    On July 1, 2019, Shanghai began the waste sorting programme. There are four kinds of waste: wet waste, dry waste, dangerous waste and recyclable waste. Under the new rules, people must put their waste in the right place. Or they will be fined more than 50 yuan and less than 200 yuan.

    Sorting waste is very important. By doing so, we can take out non-degradable(不可降解的)waste and save resources(资源)In return, we can get a better environment.  ▲   Luckily. Internet companies like Wechat, Baidu and Alipay made apps to help.

    How do we use the apps? Just open one waste-sorting app and write down the keyword. Then the app will tell us the answer and why, Alipay says its waste-sorting app got one million users in just three days and the number is still growing. They are working on the app and people may use it by taking photos in the future.

    The waste-sorting programme is the talk of the whole country now. And another 21. 3 billion yuan will be used on the programme in 46 cities by the end of 2020.