Green Hills, Clear Water, Blue Sky is a project that was set up     1     the government three years ago. Since it was started, many people have taken part. They think it is their duty     2    (make) the Earth beautiful and     3    (peace). At the same time, they insist that the government should play     4     important role and try     5    (they) best to protect the environment. Some owners of factories are. damaging the environment by     6    (pollute) rivers with chemical waste. So it     7    (believe) that the government should pass laws to punish people     8     damage the environment. Besides, the government should build conservation     9    (center )so that plants     10     animals in danger can be protected.

All in all, people and the government should work side by side to take care of the Earth.

Traditionally, livestreamers sell delicious snacks or local goodies. But     1     recent livestream event in Tibet autonomous region did something different. Waste plastic bottles,     2     are regarded as a great damage to the local environment, were sold for 0.5 yuan each, with the purpose of raising peopled     3     (aware) of Tibet’s pollution issue.

According to the Sohu website, in 2019, about 40 million tourists visited Tibet, which in consequence left about 360 million plastic bottles     4     (throw) in branches, on cliffs and in rivers. Not only does the white pollution cause serious threat to the delicate ecosystem     5     the death of local animals.

Over the past few years, more than 5,000 volunteers of different ages and from all walks of life     6     (participate) in the anti-white pollution campaign. They carry out over 2,000 clean-ups to collect 200,000 bottles left by tourists each year. Then the bottles are sorted by color and shipped inland     7     (make) raw materials. Roughly, each bottle costs about 0.5 yuan.

The livestream has successfully involved more people     8     the anti-white pollution campaign. People can scan QR code and donate money to encourage more people to collect bottles. It’s really a meaningful event and helps to make     9     possible for us human beings to coexist with nature     10     (harmonious).

Air pollution is no doubt a major concern in many big cities across the world. More than 80% of people living in urban areas     1     (expose) to unsafe air, according to a report     2     (deliver) by the World Health Organization.

“Urban air pollution continues to rise at     3     alarming rate, doing great ham to human health,” said Dr. Maria Neira, the director of Public Health and Environmental Policy at the WHO. “At the same time,     4     (aware) is rising and more cities are monitoring their air quality.”

In the past two years, the number of cities monitoring air pollution     5     (double)-now covering about 3,000 cities in 103 countries. The WHO warned of the serious effects poor air quality could have     6     the health of urban residents,     7     (link) it to the risk of strokes, heart disease, lung cancer and many other diseases.

The report also showed that low-and middle income countries     8     (general) have poorer air quality. About 98% of cities with 100,000 or more people in low-and middle-income countries do not meet WHO air quality guidelines,     9     56% in high-income countries fail to meet the standard. The report also urged local governments to take stronger and     10     (effect) measures to fight against air pollution.

With the     1    (develop) of industry, air pollution is getting more and more serious. In Beijing, many people suffer different kinds of illnesses because     2     air pollution.

Air pollution is caused by the following     3    (reason): about half of the problem is caused by vehicles. There are more and more cars, buses on the roads, and they give off     4    (poison) gases. 25% of air pollution is caused by factories. Another factor is the smokers. Smoking not only does harm to their health     5     to others.     6    (beside) these, about 10% of air pollution is caused by other reasons.

We should take some measures to fight     7     pollution. New fuel can be used to take     8     place of gas. We can plant more trees. If everybody realizes the     9    (important) of the environment and does something to stop pollution, the problem will     10    (solve)．