1 . Most environmental pollution on Earth comes from humans and their inventions, such as cars or plastic. Today, car emissions(排放物) area major source of air pollution leading to climate change, and plastics fill our ocean, creating a significant health issue to marine(海洋的) animals.
And what about the electric light, thought to be one of the greatest human inventions of all time? Electric light can be a beautiful thing, guiding us home when the sun goes down，keeping us safe and making our homes bright. However, like carbon dioxide emissions and plastic, too much of a good thing has started to impact the environment. Light pollution, the inappropriate use of outdoor light, is affecting human health, wildlife behavior and our ability to observe stars.
Light pollution is a global issue. This became obvious when the World Atlas of Artificial Night Sky Brightness, a computer-generated map based on thousands of satellite photos, was published in 2016. Available online for viewing, the map shows how and where our globe is lit up at night. Vast areas of North America, Europe, the Middle East and Asia are glowing(发光) with light, while only the most remote regions on Earth(Greenland, Central African Republic and Niue) are in total darkness. Some of the most light-polluted countries in the world are Singapore, Qatar, and Kuwait.
Sky glow is the brightening of the night sky, mostly over cities, due to the electric lights of cars, street lamps, offices, factories, outdoor advertising, and buildings, turning night into day for people who work and play long after sunset.
People living in cities with high levels of sky glow have a hard time seeing more than a handful of stars at night. Astronomers are particularly concerned with sky glow pollution as it reduces their ability to view stars.
More than 80 percent of the world’s population, and 99 percent of Americans and Europeans, live under sky glow.
1. What can we learn from paragraph 2?| A．The use of outdoor light must be forbidden. |
| B．Electric light has both advantages and disadvantages. |
| C．Electric light is the main factor to keep us safe. |
| D．Electric light is the greatest human invention. |
| A．Qatar. | B．Singapore. | C．Kuwait. | D．Niue. |
| A．Sky glow costs too much. |
| B．Sky glow has a bad effect on their sleep. |
| C．Sky glow affects their viewing stars. |
| D．Sky glow wastes too much electricity. |
| A．Light pollution | B．Plastic pollution |
| C．Different kinds of pollution | D．Air pollution |
2 . As we all know, waste is extremely bad for the environment. Let’s talk about why litter is harmful to our streets and towns, our drinking water, and sea animals.
Waste can have a bad influence on our cities. Cleaning up litter costs US taxpayers (纳税人) and businesses $11.5 billion each year.
As you can see, waste is harmful in many ways.
| A．Everybody wants to breathe fresh air. |
| B．That money could have been spent on parks. |
| C．How do you feel when you see people littering around? |
| D．In the future there might be more waste than fish in the ocean. |
| E．Litter can go into the soil and water and pollute our drinking water. |
| F．We need to stop littering for us, for the environment, and for the planet. |
| G．Did you know every day almost 8 million pieces of litter go into the ocean? |
3 . Blue Planet Ⅱ’s latest episode (情节) is about how plastic is having a terrible effect on the ocean and slowly poisoning our sea creatures. Researchers have also found that sea creatures living in the deepest place on Earth, Mariana Trench, have plastic in their stomachs. Indeed, oceans are drowning in plastic.
Though it seems that the world couldn’t possibly function without plastic, plastic is a very recent invention. The first plastic bags were introduced in the 1950s, the same decade (十年) that plastic packaging began gaining popularity in the United States. This growth has happened so fast that science is still catching up with the change. Plastic pollution research, for example, is still a very early science.
We put all the plastic into the environment, but we still don’t really know what the outcomes are going to be. What we do know, though, is disturbing. Ocean plastic is expected to kill millions of sea animals every year. Hundreds of species, including endangered ones, are known to have been affected by it. One in three leatherback turtles, which often mistake plastic bags for jellyfish, have been found with plastic in their stomach. Ninety percent of seabirds are now eating plastic regularly. By 2050, that figure is expected to rise to 100 percent.
And it’s not just wildlife that is threatened by the plastic in our seas. Humans are consuming plastic through the seafood we eat. I could understand why some people see ocean plastic as a disaster, worth mentioning in the same breath as climate change. But ocean plastic is not as complicated (复杂的) as climate change. There are no ocean waste deniers (否认者), at least so far. To do something about it, we don’t have to remake our planet energy system.
This is not a problem where we don’t know what the solution is. We know how to pick up garbage. Anyone can do it. We know how to deal with it. We know how to recycle. We can all start by thinking twice before we use single-use plastic products. Things that may seem ordinary, like using a reusable bottle or a reusable bag — when taken collectively, these choices really do make a difference.
1. Why is plastic pollution research still a very early science?| A．The plastic pollution research is too difficult. |
| B．Plastic has produced less pollution than coal. |
| C．Plastic has gained popularity too fast for science to catch up. |
| D．The world couldn’t possibly function without plastic. |
| A．By presenting reliable data. |
| B．By citing quotes from leading experts. |
| C．By making a comparison and contrast. |
| D．By listing examples from his own experiences. |
| A．We reap what we sow. |
| B．The shortest answer is doing. |
| C．All things are difficult before they are easy. |
| D．Actions speak louder than words. |
| A．The oceans become choked with plastic. |
| B．Ocean plastic is a global problem. |
| C．Blue Planet Ⅱ has left viewers heartbroken. |
| D．Plastic gains in popularity all over the world. |
4 . Three-quarters of a million tourists flock to the primitive, white beaches every year—but this booming industry has come at a price. When foreigners left the government struggling to cope with a stream of rubbish, their answer was to turn one of these islands into a dumping ground. Clouds of sharp, poisonous smoke rising from open fires, piles of rubbish made up of plastic bottles, crisp packets and consumer junk. It’s a far cry from the white sands, crystal-clear waters and gently swaying palm trees that we associate with the Maldives (马尔代夫), the beautiful paradise island holiday destination set in the Indian Ocean.
Of its 200 inhabited islands, which are spread across an area of 35,000 square miles, 99 are dedicated resorts. Three-quarters of a million tourists visit every year — more than double the domestic population. of these, over 100,000 travel from the UK. The capital, Malé, is four times more densely populated than London. Given these facts, it’s hardly surprising that the Maldives on which has a waste disposal problem.
What you are seeing here is a view of the Maldives on which no honeymooners will ever fix eyes. Four miles west of Malé is the country’s dumping ground, Thilafushi — or Rubbish Island as it has simply become known.
The country dumps upwards of 330 tons of rubbish on the island every day. A figure attributed largely to the tourist industry on which the chain of islands relies. Each visitor generates 3.5 kg of waste per day.
Now, the government of the Maldives has banned the dumping of waste on the island, which is too late, due largely to an increase in the number of waste boats “fly-tipping”(非法倾倒) directly into the sea, fed up with waiting seven hours or more to offload their cargo.
1. The government of the Maldives is in troubled faced with ________.| A．how to develop the tourist industry |
| B．where to set up a dumping ground |
| C．how to deal with the rubbish left by tourists. |
| D．where to set up dedicated resorts |
| A．the Maldives are still paradise islands with clear waters. |
| B．the Maldives rely on tourist industry |
| C．the Maldives are called Rubbish Islands |
| D．the country dumps about 330 tons of rubbish on the island every month |
| A．positive | B．satisfied |
| C．forgiving | D．critical |
| A．inform people of the present situation of the Maldives |
| B．expose people’s bad behavior on the islands |
| C．introduce the Maldives to the whole word |
| D．persuade people out of going to the Maldives |
5 . New mercury threat to oceans from climate change
Rising temperatures could boost mercury levels in fish by up to seven times the current rates, said Swedish researchers in an article published in Science Journal. They’ve discovered warming increases levels of the toxin in sea creatures. In experiments, they found that extra rainfall drives up the amount of organic material flowing into the seas. This alters the food chain, adding another layer of complex organisms which boosts the concentrations of mercury up the line.
Mercury is one of the world’s most toxic metals, and according to the World Health Organization, is one of the top ten threats to public health. The substance at high levels has been linked to damage to the nervous system, paralysis and mental impairment in children.
The most common form of exposure to mercury is by eating fish containing methylmercury, an organic form of the chemical which forms when bacteria react with mercury in water, soil or plants. Levels of mercury in the world’s ecosystems have increased by between 200% and 500%, since the industrial revolution, say experts, driven up by the use of fossil fuels such as coal.
In recent years there have been concentrated efforts to limit the amount of mercury entering the environment, with an international treaty, called the Minamata Convention, signed by 136 countries in place since 2013.
Researchers hope that the Minamata treaty will be successful and countries reduce the amount of mercury that is being produced. Otherwise this discovery of a previously unknown source could have impacts for human health.
Other researchers in the field say that the new study highlights important issues that have previously been little known.
“This work experimentally proves that climate change will have a significant effect of methylmercury budgets in coastal waters and its accumulation in fish,” said Milena Horvat from the Jozef Stefan Institute in Slovenia.
“This work will also help us understand the formation of mercury in fish and help reduce mercury from emission sources (primarily industrial).”
1. Where did Swedish researchers find warming increases levels of the toxin?| A．In the Pacific Ocean. | B．On the Continent. |
| C．In Red Sea. | D．In sea creatures. |
| A．Exposure to mercury. | B．Mercury at high levels. |
| C．Methylmercury. | D．The use of fossil fuels. |
| A．By limiting the amount of mercury entering the environment. |
| B．By reducing the amount of mercury. |
| C．When bacteria react with mercury in water, soil or plants. |
| D．When climate change returns to normal. |
| A．Climate change will increase the levels of mercury in food. |
| B．Levels of mercury in the world’s ecosystems have increased by between 200% and 500%. |
| C．The Minamata Convention has been signed by 136 countries in place since 2013. |
| D．Mercury reduction from emission sources can be beneficial to fish. |
