The world itself is becoming much smaller by using modern traffic and modern communication means. Life today is much easier than it was hundreds of years ago, but it has brought new problems.
Man has been polluting the earth.
The earth is our home. We must take care of it.
A.One of the biggest is pollution. |
B.The more people, the more pollution. |
C.Air pollution is still the most serious. |
D.That means keeping the land, water and air clean. |
E.Many countries are making rules to fight pollution. |
F.I hope scientists can find ways to solve the serious problem. |
G.Strange diseases have appeared in some places because of pollution. |
It feels good to recycle. There’s a certain sense of accomplishment that comes from carefully sorting soda bottles, plastic bags and yogurt cups from the rest of the garbage. The more plastic you put in that blue bin, the more you’re keeping out of landfills and the oceans, right?
Wrong. No matter how meticulous you are in cleaning and separating your plastics, most end up in the trash anyway. Take flexible food packages. Those films contain several layers of different plastics. Because each plastic has to be recycled separately, those films are not recyclable. The polypropylene (聚丙烯) in yogurt cups and other items doesn’t usually get recycled either; recycling a hodgepodge of polypropylene produces a dark, smelly plastic that few manufacturers will use.
Only two kinds of plastic are commonly recycled in the United States: the kind in plastic soda bottles, polyethylene terephthalate, or PET; and the plastic found in milk containers — high-density polyethylene, or HDPE. Together, those plastics make up only about a quarter of the world’s plastic trash. And when those plastics are recycled, they aren’t good for much. Melting plastic down to recycle changes its consistency, so PET from bottles has to be mixed with brand-new plastic to make a sturdy final product. Recycling a mix of multicolored HDPE pieces creates a dark plastic good only for making products like park benches and waste bins, in which properties like color don’t matter much.
The difficulties of recycling plastic into anything manufacturers want to use is a big reason why the world is littered with so much plastic waste, says Eric Beckman, a chemical engineer at the University of Pittsburgh. In 2018 alone, the United States landfilled 27 million tons of plastic and recycled a mere 3 million, according to the U.S. Environmental Protection Agency. Low recycling rates aren’t just a problem in the United States. Of the 6.3 billion tons of plastic that have been discarded around the world, only about 9 percent has gotten recycled. Another 12 percent has been burned, and almost 80 percent has piled up on land or in waterways.
【小题1】What is the purpose of paragraph 1?A.To show a lifestyle. | B.To describe a phenomenon. |
C.To introduce a topic. | D.To make a proposal. |
A.Painful. | B.Forgetful. | C.Regretful. | D.Mindful. |
A.Manufacturers don’t want to use recycled plastic. |
B.There is an urgent need to reduce plastic waste. |
C.More plastic can be dealt with by burning. |
D.U.S. is to blame for the plastic problem. |
A.The causes of plastic pollution. |
B.The characteristics of different plastics. |
C.The ways that most plastics are recycled. |
D.The reasons why many plastics are not recycled. |
Graph 1: Olympic Cities Air Quality Report
City | Date | API | Major Pollutant | Air Quality Degree | Quality Condition |
Beijing | Sep. 8 | 37 | N/A | Ⅰ | Very good |
Qinhuangdao | Sep. 8 | 52 | PM10 | Ⅱ | Good |
Qingdao | Sep. 8 | 68 | PM10 | Ⅱ | Good |
Shanghai | Sep. 8 | 67 | PM10 | Ⅱ | Good |
Shenyang | Sep. 8 | 88 | PM10 | Ⅱ | Good |
Tianjin | Sep. 8 | 54 | PM10 | Ⅱ | Good |
Graph 2: Chinese National Standard
API Values | Levels of health concern | Colors |
When the API is in this range: | ...air quality conditions are: | ...as symbolized by this color: |
0 to 50 | Very good | Blue |
51 to 100 | Good | Green |
101 to 150 | Slight pollution | Yellow |
151 to 200 | Moderate pollution | Orange |
201 to 250 | Medium pollution | Red |
251 to 300 | High pollution | Purple |
301 to 500 | Hazardous | Brown |
Notes:
**API stands for Air Pollution Index(指数).
**Particulate matter (PM10) is a major component of air pollution that threatens both our health and our environment. It consists of very small liquid and solid particles floating in the air.
**Sulfur dioxide(SO2) acts as an acid.Inhalation(吸入) results in labored breathing, coughing, or a sore throat and may cause permanent lung damage.
【小题1】According to Graph 1, which of the following cities has the worst air pollution?
A.Qinhuangdao. | B.Tianjin. |
C.Qingdao | D.Shenyang. |
A.Moderate or high. | B.Moderate or slight. |
C.Medium or high. | D.Medium or slight. |
A.With API value below 150 the air is free from being polluted. |
B.The colors from purple to Yellow indicate the air quality is becoming much worse. |
C.When there are floating solid particles and dust in the air, it is dangerous pollution. |
D.On September 8th the color-symbol of Beijing City’s air quality is ‘Blue’. |
A.there is a large amount of sulfur dioxide in the air |
B.it is so cold that they may have caught a cold |
C.they are starting to cough or have a fever |
D.they must be infected with permanent lung disease |
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