Litter is everywhere, doing great harm     1     the environment and life on our planet. Jeff Kirschner, who wants to build a litter-free world, started a global community named Litterati     2    (settle) this problem.

The story began with his 6-year-old daughter. One day they were going on a hike when the girl noticed a broken plastic tub (浴盆) in a river. She said, “Daddy, that doesn't go there.”That took Kirschner by surprise. He, like many adults, had become so used to seeing the rubbish     3    (throw) around them that he hadn't given it a second look.     4     his daughter said reminded him of the serious problem our planet faces.

Jeff started to take     5    (act). He created Litterati, an app that makes it fun to pick up litter. The idea is     6     (fair) simple: Spot a piece of trash, take a photo, post the photo online and then put the litter into dustbins.

    7    (see) that Jeff was keeping a record of the positive impact he was having on the planet, people worldwide started participating. Up to now, over 2,500,000 photos     8    (post) by 3,500 people from over 40 countries have found their way to Litterati's digital landfill.

Litterati is more than an app. It is highly     9    (effect) solution to a pressing issue. Wherever you live, whatever you do and     10     you are, join Litterati to make the world a cleaner and healthier place to live in.

When I was a child, I hoped to live in the city because I think I would be happy there. Now I am living in a city, but I miss my home in countryside. There the air is clean or the mountains are green. Unfortunately, on the development of industrialization, the environment has been polluted. Lots of studies have been shown that global warming has already become a very seriously problem. The airs around us is getting dirtier and dirtier. Much rare animals are dying out. We must found ways to protect your environment. If we fail to do so, we will regret it.

4 . In an effort to fight the “throw-away culture” and promote reuse and repair, the city of Berlin has taken the unique step of opening its own secondhand department store.

This isn’t your grandma’s thrift shop (旧货商店). It resells perfectly good items that would otherwise be thrown away. A pun on the German words for “department store” and “conserving house”, B-Wa(h)renhaus sells a wide variety of products. Far from simply selling old items, the electronic goods have been fixed by expert technicians and come with a year’s guarantee. And, to reach more secondhand shoppers, the store was set up right in the middle of the famous Karstadt department store.

With the success of its initial six-month trial run, the city plans to open four more similar operations in other parts of Berlin. By 2030, it hopes to have at least one location in each of Berlin’s 12 districts. Since 2008, city policies and educational campaigns have reduced average annual household waste by about 25 pounds per resident. It also recycles about 49% of its mineral construction waste. Currently, the city estimates that 8% of abandoned electronic goods and 6% of huge items thrown away can actually be reused. The goal is to expand the market for these items beyond the usual bargain hunters and eco-conscious consumers.

“Three years ago, we started collecting all kinds of used goods,” city spokesperson Dorothee Winden said. “There are lots of things that are well-preserved and functioning but aren’t being used anymore. The goal is to give these things a new life with somebody who can use them.” The store also includes an education center to encourage more sustainable lifestyles — and also gave an award to a project that recycles school uniforms, so that parents don’t have to buy new ones every year.

5 . The newly-elected president of Brazil, Jair Bolsonaro says that his country should withdraw (退出) from the 2015 Paris Agreement, and that Brazil’s rainforest protections are standing in the way of economic success. During the election campaign, he promised to ease protections for areas of the Brazilian Amazon set aside for native people and wildlife. Are Brazil’s rainforests in danger?

The Amazon, the world’s largest rainforest, is called “the lungs of the planet.” Each tree takes in and stores carbon dioxide from the air around it. Billions of trees pull up water through their roots and release water vapor into the air, forming tiny drops of water. The Amazon creates 30 to 50 percent of its own rainfall. Carlos Nobre, a climate scientist, says that it is almost impossible to say Just how important the rainforest is to the planet’s living systems.

Some of Bolsonaro’s support comes from business and farming groups. One supporter, Luiz Carlos, noted that farmers “are not invaders, they are producers.” He blamed the past government for supporting rainforest protections at the cost of farmers. “Brazil,” he said, “will be the biggest farming nation on Earth during Bolsonaro’s years.”

Paulo Artaxo, a professor of environmental physics at the University of Sao Paulo, says that if Bolsonaro keeps his campaign promises, then “deforestation of the Amazon will probably increase quickly — and the effects will be felt everywhere on the planet.”

Other scientists warn that if the Amazon and other tropical rainforests lose too many trees, this could affect rainfall in other areas. Without enough trees to support the rainfall, the longer and bigger dry season could turn more than half of the rainforest into a tropical grassland.

6 . Clothing rental is a hot new industry and retailers (零售商) are demanding to get on board in hopes of attracting green shopper.

But is renting fashion actually more environmentally-friendly than buying it, and if so, how much more? Journalist and author Elizabeth Cline investigated (调查) this question and concluded that it's not as sustainable as it seems.

Take shipping, for example, which has to go two ways if an item is rented — receiving and returning. Cline writes that consumer transportation has the second largest carbon footprint of our collective fashion habit after manufacturing.

She writes, ''An item ordered online and then returned can send out 20 kilograms of carbon each way, and increases up to 50 kilograms for rush shipping. By comparison, the carbon impact of a pair of jeans purchased from a physical store and washed and worn at home is 33.4 kilograms, according to a 2015 study by Levi's.''

Then there's the burden of washing, which has to happen for every item when it's returned, regardless of whether or not it was worn. For most rental services, this usually means dry cleaning, a high impact and polluting process. All the rental services that Cline looked into have replaced perchloroethylene (氯乙烯), a carcinogenic (致癌的) air pollutant, still used by 70 percent of US dry cleaners, with alternatives, although these aren't great either.

Lastly, Cline fears that rental services will increase our appetite for fast fashion, simply because it's so easily accessible. There's something called ''share washing'' that makes people waste more precisely because a product or service is shared and thus is regarded as more eco-friendly. Uber is one example of this, advertised as ''a way to share rides and limit ear ownership.'' and yet ''it has been proven to discourage walking,bicycling, and public transportation use.''

Renting clothes is still preferable to buying them cheap and throwing them in the dustbin after a few wears, but we shouldn't let the availability of these services make us too satisfied. There's an even better step — that's wearing what is already in the closet.

7 . Greening the Kubuqi Desert

China has seen great achievements in improving the environment and green development over the past 70 years. Solid efforts have been made to fight pollution and continuously improve the environment.

    1     It caused deadly sandstorms, which arrived like big black walls reaching up into the sky.

As President Xi Jinping has said, clear waters and green mountains are invaluable assets（资产）.     2    

A series of campaigns have been carried out by the central government to improve the environment.     3     Thanks to the program, forest coverage in China had increased from 12 percent in the 1980s to nearly 23 percent last year.

    4     It has been recognized by the UN for the development of a desert eco-industry that has slowed desertification（沙漠化）.

In Kubuqi, a desert in the Inner Mongolia autonomous region, Elion has greened 600,000 hectares of land and helped lift more than 102,000 people out of poverty through the development of solar energy and tourism, as well as planting herbs for traditional Chinese medicine.

In addition, the group’s techniques have also been used in many ecological（生态的）programs, including Yangtze River Ecological Park and Qilian Mountain National Park.

“    5     With the help of modern technologies, such as drones, AI, big data and the internet of things, we are sure to achieve greater success,” said Ao Baoping, chief executive officer of Elion Green Land Technology.

8 . Let's take a minute to think about the water we use. The human body is 60% water and we need to drink lots of water to be healthy. When we are thirsty we just go to the kitchen and fill a glass with clean water.

    1    For example, farmers, who produce the food we eat, use water to make the plants grow. When we turn on a light or switch on a TV or a computer we use energy and we need water to produce this energy.

The truth is that we are lucky enough to have clean water whenever we want，but this is not the case for many people around the world.    2    That's around one in 10 people in the world. If we drink dirty water，we can catch diseases from the bacteria and become ill. Every year over 500，000 children die from diarrhea(腹泻)from dirty water. That's around 1，400 children every day！Also，in some countries children walk many kilometres every day to get water.    3    Therefore，they don't have time to learn how to read or write and don't get an education.

    4    On this day every year，countries around the world hold events to educate people about the problems of dirty water and that clean water is something that everyone should have around the world. At one school in the UK，children between the ages of 10 and 15 walk 6km with six litres of water.    5    People give them money to do this and all the money helps get clean water to as many people as possible around the world.

9 . You'll need to take a deep breath before hearing this news. An astonishing 93% of kids around the world live in environments with air pollution levels that are damaging their health, according to a new report by WHO.

Air pollution is to blame for the deaths of 543,000 kids under 5 in 2016, with more than one in four deaths of children under five years old being related to environmental issues. Exposure (暴露)to air pollution can damage the health of kids in a variety of ways, either causing or being associated with everything from low birth weight to childhood obesity and so on.

"The large toll of disease and death revealed (揭示)by these new data should result in an urgent call to action for the global community especially for those in the health department WHO stated. “ Strong action to reduce exposure to air pollution offers an opportunity to protect the health of children. " The report stressed that health experts should communicate with families , communities and policy-makers about the serious risks of air pollution exposure. " Although more researches into how air pollution affects children's health will continue to be valuable, there is already evidence to justify strong, swift action to prevent the damage it clearly produces," WHO added.

Disease caused by dirty air is more common in low-and-middle in come countries, especially those in Africa, South-East Asia, and Western Pacific regions. Poor countries in these areas have the highest levels of exposure to household air pollution due to the use of polluting fuels and technologies for basic needs like cooking, heating and lighting.

Advised solutions include cleaner transport , cleaner cooking and heating fuels and technologies   energy-efficient housing and urban planning, safer industrial technologies and better waste management.

10 . Plans to bring wild tigers back to their original home , their historical range(历史分布范围） in the Ili­Balkhash region, have been announced by Kazakhstan( 哈萨克斯坦 )   and an agreement with World Wide Fund for Nature (WWF) to conduct a tiger reintroduction program has been signed . “It will not only bring wild tigers back to their original home, but also protect the unique ecosystem of the Ili­Balkhash region，” said Askar Myrzakhmetov, the Minister of Agriculture of the Republic of Kazakhstan.

If successful, Kazakhstan will be the first country in the world to bring wild tigers back to an entire region where they have died out for nearly half a century. Tiger reintroduction projects have only been achieved within national borders and in areas that are considered current tiger habitats . Kazakhstan's tiger reintroduction program is unique and it badly requires the restoration of a vast forest that is part of the wild tiger's historical range.

Since the beginning of the 20th century, wild tigers have lost over 90 per cent of their historical range. Wild tigers have completely disappeared from the region since the late 1940s, due to the loss of habitat. To prepare for the return of wild tigers, on 1st January 2018 Kazakhstan will set up a new nature reserve in the southwestern Ili­Balkhash, in order to restore the unique forest habitat. This will include the protection of existing wildlife, and reintroducing important prey ( 猎物 ), such as the endangered wild Bactrian deer（中亚红鹿).

Restoring tigers will also help protect Lake Balkhash and prevent it from repeating the fate of the Aral Sea, formerly the world's fourth largest lake and now 10 percent of its original size. “The hard work remains ahead of us. We have to spare no effort to make this region ready for tigers and involve all the relevant people to make this happen. That means dealing with illegal activities, having these people who govern parks be well­trained and equipped, increasing prey populations and involving local communities，” said Ekaterina Vorobyeva, Director of the WWF program.