Passage Going Solar in China
Going Solar in China
In the Anhui province of China, 166,000 floating solar panels are strung together atop the rippling surface of a lake. It is the largest solar-power farm in the world, an immense blanket of renewable energy strong enough to power 15,000 homes.
The floating solar-power farm, which harvests the sun’s rays for power, was first conceived by the Sungrow Power Supply Company after heavy rains flooded a collapsed coal mine and created a lake. Sang Dajie, a former coal miner from the area, is now an electrician for the farm, which occupies the original mine site where he used to work. Now, instead of working under the dangerous conditions at the mine, he spends his days maintaining the solar panels on the water. “The coal mine,” says Dajie, “was very hot and the air was bad. . . . But here I feel safe. The new energy is safe.” People in China rely primarily on the burning of coal in massive power plants to create electricity. While the burning of fossil fuels, like coal, is a reliable source of energy, the process releases massive amounts of carbon dioxide into the atmosphere, creating air pollution and harming Earth. Solar power, on the other hand, is clean and safe for the environment.
Solar panels are typically placed on rooftops or in open fields, but experts in China determined that the newly formed lake was a great spot for the solar-power farm. Solar-power farms over water are efficient because the water keeps the panels cool. A water-based solar-power farm can potentially generate more power than one based on land. Additionally, with the solar-power farm on the lake, the land in the surrounding area remains available for farming, which is another source of income for Anhui residents.
Originally, China displayed minimal interest in solar energy. The use of solar energy was limited primarily to rural areas that had no access to a power grid. Without access to other means of electricity, people in these areas used solar panels as an alternative to lighting candles and kerosene lamps. China began to manufacture solar panels for other countries in the late 1990s when the German government offered its people financial incentives for installing solar panels. The heightened demand for solar panels was instantaneous, and Chinese businesses were quick to seize the opportunity. Soon the governments of Spain and Italy also offered incentives for using solar technology, and Chinese manufacturers were ready for the increased demand.
Between 2008 and 2013, China improved its manufacturing technology and processes so much that it effectively lowered the worldwide cost of using solar energy by 80 percent, further increasing demand. However, a point came when Chinese manufacturers had become so efficient at producing solar-power equipment that they outpaced the demand. The manufacturers were producing two solar panels for every one solar panel they sold. In order to make manufacturing a profitable industry again, the Chinese government offered its own financial incentives to Chinese citizens for using solar energy. Now, projects like the floating solar-power farm are putting those surplus panels to use, in addition to providing jobs and cleaner energy.
A second solar-power farm has already been constructed near the massive one in Anhui as part of a government initiative to build more low-emission power plants. The goal is to meet 20 percent of the country’s energy needs with renewable, clean energy sources by the year 2030.
As Sang Dajie puts it, “I’m glad we are reusing this area to create a better future.” China’s dedication to increasing its production of renewable energy through solar power demonstrates that patience, time, and flexibility can result in transformation.
Question
How do the details in paragraph 6 about the solar-power goals of the Chinese government convey a central idea of the article?
- AThey indicate that the Chinese government wants China to be the world leader in solar-energy production.
- BThey show that the Chinese government understands the benefits of transitioning to renewable energy sources such as solar power.
- CThey suggest that constructing solar-power farms is the best way for the Chinese government to put excess solar panels to use.
- DThey imply that solar farms are a good way for the Chinese government to make solar power the main source of energy in China.
Show the answer
Correct answer: B
The question asks how the details in paragraph 6 convey a main idea of the article.
A. Incorrect. The details in paragraph 6 help explain that China has a goal of increasing its use of solar power, but there is no information in the paragraph to suggest that the Chinese government wants to make China a world leader in solar energy. The only goal discussed is the government’s goal to use renewable energy sources to meet 20 percent of the country’s energy needs by 2030.
B. CORRECT. The discussion of a second solar farm and the government’s goal to increase its reliance on “low-emission power plants” shows that the Chinese government understands the benefits of solar energy and other renewable energy sources.
C. Incorrect. Paragraph 6 addresses the Chinese government’s focus on increasing its use of renewable energy and low-emission power. The topic of excess solar panels is not discussed in paragraph 6; instead, the topic is mentioned in paragraph 5.
D. Incorrect. The paragraph explains that the goal of the Chinese government is to increase the use of renewable energy so that 20 percent of the country’s power comes from such sources by 2030. However, this goal would not make solar power the main source of energy in China.
Question analysis
Paragraph 6 of “Going Solar in China” reports a second solar-power farm and a national goal for renewable energy by 2030. This central-idea question asks how those details about the Chinese government’s plans convey a central idea of the article. The paragraph is short, but the choices differ in how far they go beyond what it actually says.
- Grade level
- Grade 7 reading and task
- Compared with grade 7
- Below grade 7 Linking a paragraph’s details to a central idea is grade 7 work, but this paragraph has only two plain sentences, and checking each choice against them takes one careful reading, below the usual grade 7 demand.
- Estimated difficulty
- Straightforward: two steps or one careful reading.
- Thinking it demands
- Depth of knowledge 2, skills and concepts · mainly analyze
- What makes it hard
- Evidence
- Answered from one paragraph or stanza
- Reading level
- Passage: about grade 13, 598 words; question and choices: about grade 12, 101 words.
- Students, last 30 days
- Not enough answers yet to show (it takes 10).
Why it is hard, traps and wrong answers (shows the answer)
Why it is hard
The paragraph is two sentences long, and the right choice says little more than they do. The wrong choices are harder to dismiss because each attaches to something real: the farm is called the world’s largest in paragraph 1, the surplus panels come from paragraph 5, and the goal does concern renewable energy. The figure that settles the last of them is “20 percent,” far from making solar China’s main source of power.
Reading between the lines minor Working it out
Paragraph 6 reports a second farm and a 2030 goal but never says the government understands anything; that has to be read from its decision to build “more low-emission power plants.” (Graesser, Singer & Trabasso, 1994; Kintsch, 1998)
Every choice must be checked minor Choosing the answer
Each wrong choice goes past the paragraph in its own way, a world lead, a best use for surplus panels, solar as the main source, so every claim must be measured against two sentences. (Embretson & Wetzel, 1987)
Strategy: Reread the two sentences of paragraph 6 and put the government’s plan in your own words, then keep only a choice those sentences support without adding to them.
Traps
- Too broad or too strong: A choice overstates, generalizes, or uses absolute words the text does not support.
- Outside knowledge: A choice is plausible in the real world but not supported by this text.
- Wrong part of the text: A choice is true of another paragraph, stanza or speaker than the one asked about.
The wrong answers, classified
A Outside knowledge (King et al., 2004; Recht & Leslie, 1988)
Assumes a government building record solar farms wants to lead the world, a plausible real-world aim, though paragraph 6 speaks only of meeting China’s own energy needs.
C Wrong part of the text (Kirsch & Mosenthal, 1990)
Brings in paragraph 5’s surplus panels that projects like the floating farm put to use, but paragraph 6 is about low-emission plants and a 2030 goal, not extra panels.
D Too broad or too strong (King et al., 2004)
Inflates the goal of meeting 20 percent of the country’s needs with all renewable sources into making solar power China’s main source of energy.
Working it out, step by step
Figure out the question
This asks how paragraph 6 helps show a central idea, a main point of the whole article. Paragraph 6 is only two sentences long. So read them closely, and pick the choice that says no more than they do.
Read paragraph 6
The first sentence says a second solar farm was built “as part of a government initiative to build more low-emission power plants.” An initiative is a plan to get something done. Low-emission means giving off very little pollution. The second sentence gives the goal: to meet “20 percent of the country’s energy needs with renewable, clean energy sources by the year 2030.”
Connect it to the article
Back in paragraph 2, the article explains that burning coal causes air pollution, while solar power is clean. Paragraph 6 shows the government acting on that difference. It is building more clean power plants and setting a target for clean energy. A government plans like this only when it sees the gains. So it understands why the change is worth making.
Test each choice
- A does not fit. The goal is about China’s own needs. Nothing compares China with other countries.
- B fits. Building low-emission plants shows the government sees the good in renewable energy.
- C does not fit. Extra panels come up in paragraph 5, not 6. And nothing calls farms the “best way” to use them.
- D does not fit. Twenty percent is one fifth, and it is for all renewable sources together. That is far from making solar the main source.
Pick the answer
Watch out: D is tempting because the goal is about clean energy. But the main source means the biggest share, and paragraph 2 says China still relies mostly on coal. So the answer is B.
Why this answer and not the closest wrong one
D is the closest wrong choice. Paragraph 6 does set a goal for clean energy. But the goal is 20 percent from all renewable sources, so solar would not become China’s main source. B claims less, and paragraph 6 fully supports it. A government building cleaner plants clearly sees their benefits.
More questions like this
The original DOE question

The passage “Going Solar in China” as printed (page 174)
