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).

A new bill has been     1     (official） passed in the Philippines that requires students to plant 10 trees each before graduation. According to the details     2     (outline) in the bill, the rule applies to all students who are to graduate from primary school, high school, and college. Trees can be planted in     3     forests, reserves, urban areas, abandoned mining sites, or in communities.

Over the past decades, the Philippines     4    （lose） more than 30% of its forest cover due to     5    (legal) logging （伐木），but the new bill means that the younger generation can help to address the problem. Under the new rule, 175 million new trees could be planted by students each year. If only 10% of them survive,     6     means that 525 billion trees can grow up over the course of one generation.

In fact, this isn't the only positive rule     7    concerns the younger generation. One school in India made its students     8    (pay) their school fees by collecting, bringing to school, and recycling plastic waste that was lying     9     the town. This helped raise     10     （aware） of plastic waste in Asian countries. It also allowed more students to seek education and even helped the students to earn some money so they wouldn't have to rely on child labour for a living.

As one of the most well-known tourist     1     (attraction) in China’s Guangxi Zhuang Autonomous Region, the beautiful Li River was polluted. Water in the river suffered greatly as tourists     2     (throw) rubbish into the river. Besides, people on the boats poured the oil from the kitchens into the water. Also chemicals used to increase crop production resulted     3     poor water quality, causing a decrease in the number of fish species.     4     (lucky), local officials were concerned about the issue and began to take steps     5     (address) it. By     6     (construct) waste water treatment facilities and closing or moving polluting enterprises,     7     water quality was improved. Not only were new rules introduced to preserve the river,     8     the local authorities also used the media to spread environmental     9     (aware) and encourage greater use of clean energy. With these measures, China’s waterways are heading towards a clean and     10     (sustain) future.

Each year, billions of pounds of trash and other    1    （pollute）enter the ocean. Where do they go? Some sinks, some is eaten by sea animals    2    mistake it for food and some washes up on our beaches.

"There's almost nothing    3    （bad）than oceanfront sands littered with trash. It could be paradise," said Ma Jiayu, who joined the International Coastal Cleanup event, which was held by the Blue Ocean Conservation Association（BOCA）,    4    nonprofit organization in Shenzhen.

On the third weekend of last September, hundreds of volunteers    5    （arm）with bags, gloves, litter pickers got to work cleaning beaches. The volunteers—    6    （include）teenagers, teachers, workers and statesmen—    7     （separate）into 26 cleaning spots along the 260.5 kilometer coastline.

Founded by a few divers, the BOCA has long gone to the bottom of the ocean to clean.    8    heavy scuba tanks （潜水空气瓶）,masks and dive fins, divers face the dangers of low visibility or getting stuck. But they are happy    9    （save）clownfish and protect the coral reefs.

"Change comes from each of us, through our actions and    10    （behave）. If you do it, others might do it as well through the power of example. And they will teach others to do it too, and slowly, our plant might start being a cleaner place," said Ma Haipeng, the chairman of the BOCA.

Light pollution is defined by the Lighting Research Center as the     1     (want) consequence of outdoor lighting such as street lights. Too much man-made light at night results in disturbed     2     (nature) cycles, and also prevents the     3     (observe) of stars and planets at night. But its effects     4    the environment go beyond that.

By     5     (study) some trees, researchers found out that trees that are more         6     (expose) to artificial lighting at night bud (发芽) up to 7.5 days earlier than those at the normal nighttime setting. And they found out that light had a more significant effect than temperature     7     the buds came out. The early budding may cause problems for insects, which feed on     8     (leaf), and the birds which feed on them in turn.

Migratory birds(候鸟) are also     9     (negative) affected by light pollution. The glare might confuse them and make them lose     10     (they) flying sense. The phenomenon might explain why some birds accidentally knock into buildings.