It is generally believed that tourism is very important for any country.【小题1】, tourism can finally lead to a series of problems.

Forests are cut down to make way for tourism

Rapid growth of tourism in an area always creates a huge need for more buildings. Forests are cut down to make space for parking lots and theme parks or hotels.【小题2】, air pollution will become a serious problem in those areas.

Tourism causes noise pollution

Places that attract big crowds of tourists every year produce loud noise either from the cars or loud music played by visitors.【小题3】. It puts people at risk of developing high blood pressure and heart problems. In some animals, loud noise makes their hearts heat faster and hurts their ability to survive(生存).

Tourism causes light pollution

【小题4】. Natural light is very important for some animals, especially for baby sea turtles. They are known to stay under the sand until temperatures get cooler, so they cone out at night. They then move towards the brightest area which is the ocean. But many baby turtles die when they move towards brightly lit places around beaches and get lost.

Tourists are leaving behind mountains of trash

Seeing plastic cups and glass bottles around sea shores by the beaches isn't something new. It has become a common sight, especially in those places most frequently visited by tourists.【小题5】. Many fish and other animals in the seas have been killed by them.

In order to get rid of goldenrod from the city, the government of Wuhan is encouraging residents to report any findings of the plant, which is classified as a harmful alien species.

Goldenrod is one of the most successful and widespread alien plant species. It is often referred to as “the flower of the devil”, as it spreads extremely fast and causes other plants to die.

Besides Hubei province, the plant has also been found expanding in other provinces such as Jiangxi and Zhejiang. Although local authorities have tried to get rid of the plant, it is proving to be a difficult task. Goldenrod represents just one of the alien species that are aggressive towards the country’s native species. Statistics show that by 2020, nearly 800 kinds of alien species had invaded the country, among which 638 species have invaded the country’s agricultural and forestry ecosystems, causing direct economic losses of about 200 billion yuan ($ 31.36 billion).

At the United Nations Biodiversity Conference held in Kunming, Yunnan province, the invasion of alien species was the subject of discussions, as it was regarded as one of the two most important factors leading to the loss of biodiversity, the other being human-caused ecological damage.

China passed its Biosecurity Law on April 15, 2021, which provides the legal basis for preventing the invasion of alien species and protecting biodiversity in the country. The relevant departments also strictly carry out port inspections and quarantines (检疫) so as to keep harmful organisms out of the country, and they strengthen early warning and monitoring systems so as to address the invasion as early as possible.

However, while government departments are making every effort to prevent and control the situation, the participation of the people should not be ignored. It is also necessary, as Wuhan is doing, to encourage people to pay attention to invasive species and actively play a role in keeping them at bay. Preventing any invasion by an alien species and protecting biodiversity should not just be the government departments fighting alone, but also a people’s war.

If you live in Shanghai, you might have taken a “lesson” in sorting (分类) garbage, as the city introduced new garbage-sorting regulations on July 1, 2019.

As China’s first city to carry out strict regulations(规则) on garbage sorting and recycling, Shanghai requires its residents to sort garbage into four categories, namely recyclable, harmful, dry and wet waste. If people fail to sort their garbage properly, they can be fined up to 200 yuan.

Since the regulation took effect, the amount of total daily waste in Shanghai has been reduced by an average of 15,500 tons, dropping 26 percent from the end of 2018, while the average daily weight of recyclables hits 4,500 tons, five times higher than the end of 2018, according to the Shanghai Landscaping and City Appearance Administrative Bureau.

The city also rebuilt 21,000 waste-sorting stations and more than 40,000 waste bins have been updated. The city’s waste collection and transportation system is complete, according to the bureau.

“Proper waste sorting is to protect the environment and save natural resources,” said Deng Jianping, director of the bureau. “Led by the central government, Shanghai is making efforts to develop long-term solutions to garbage management.”

However, there have also been some problems. Some people complained that it is difficult to deal with wet garbage, as they are asked to remove wet garbage from its bag when dumping (倾倒). According to the sorting rules, the wet garbage must go in the wet waste bin and the bag must go in the dry waste bin.

This separation is necessary, as it ensures that the wet garbage will decompose (分解) properly and become useful organic (有机的) waste, the bureau said.

Plastic bags can affect this process. Some people in Shanghai are instead using paper bags that can biodegrade（生物降解）or plastic containers that can be washed and reused, according to Xinhua.