The Biofuels Reading Answers page helps you practise finding information, understanding scientific explanations, following cause-and-effect relationships, and identifying paraphrased information. The passage discusses the growing interest in biofuels, their history, environmental concerns, food security issues, and the development of fuels made from waste biomass and non-food crops.
This page includes practice questions: Matching Information and True/False/Not Given questions based on the supplied Biofuels passage. The questions and answers on this page are original practice questions, not official IELTS questions.
For a quick reference, here is the official Biofuels Reading Answer Key:
Question
Answer
1
D
2
F
3
B
4
A
5
E
6
C
7
MOLECULES
8
CELL WALLS / STRUCTURAL COMPONENT
9
FERMENT
10
SWIHGRASS
11
CORN
12
E
13
C
After checking your answers, use this practice page to test how well you can locate specific information, understand the development of biofuels, identify paraphrased information, and follow the different processes, benefits, and challenges discussed in the Biofuels passage.
Biofuels IELTS Reading Passage for Practice
This BiofuelsIELTS Reading passage talks about the emergence of biofuels and the controversy about the impacts that they might have on the environment and society. While reading, you should note down various sources of biofuels, production processes, scientific studies, and future prospects.
Bio Fuels
Paragraph 1
We're informed that corn yields will soon be worth as much as oil. This is due to the promotion of corn and a few other crops as next-generation biofuels. All fuels made from organic material are collectively referred to as biofuels. The two most popular biofuels are biodiesel and bioethanol, which can be used in place of gasoline. Rising oil prices have not only made biofuels economically viable again after a long absence, but they may also enable nations to import fewer fossil fuels in the future. But in the eyes of many, their reputation as eco-friendly is what really makes them stand out.
Paragraph 2
Proponents assert that because the crops absorb carbon dioxide from the atmosphere as they grow, they will significantly reduce our net emissions of greenhouse gases. Given this information, it should come as no surprise that environmentalists and governments from all over the world are supporting the idea and expecting that soon we will be using this eco-friendly option to power our vehicles, buses, and trains. But some experts are starting to doubt the social and environmental justifications for biofuels. They think biofuels won't solve the issue; instead, they'll obliterate rainforests, drain water supplies, wipe off species, and drive up food prices. Worst of all, they assert that if the technology underlying them does not advance, many biofuels will hardly mitigate global warming at all. Supporters of biofuel argue that since it is still in its infancy, we should give this technology the time and resources necessary to fulfill its potential. So, who is correct?
Paragraph 3
While the controversy may be recent, the concept of biofuels is not. Rudolf Diesel, who developed the diesel engine in 1892, ran his demonstration model on peanut oil even though the Model T Ford, which was initially built in 1908, was supposed to operate on ethanol. As petroleum-based gasoline appeared and became cheaper to produce, biofuels lost popularity. But some nations moved back to biofuels after the early 1970s oil crisis. For instance, Brazil has been using sugarcane to produce significant amounts of ethanol for more than 30 years. Brazilian legislation now mandates that bioethanol, which is compatible with all gasoline-powered vehicles, be blended with the fuel at a rate of 20%. Even more than 15% of cars in Brazil can run entirely on bioethanol.
Paragraph 4
Brazil uses just 3% of its agricultural area to produce 10% of its whole fuel consumption, so it's no surprise that other countries are trying to adopt its strategy. This is according to recent research by the World Watch Institute. The issue is that the figures don't tally up in the majority of other nations. According to the same analysis, the US would need 30% of its agricultural area to reach that 10% goal, and Europe would need a whopping 72%. There is no mystery as to why things compare so differently. Brazilians not only drive far less than Europeans and Americans, but also produce more crops and have lower population densities because to their lush terrain and good climate.
Paragraph 5
At every stage of production, from seed sowing to fuel production, a number of research teams have attempted to compare the emissions of fossil fuels with those of corn bioethanol. Scientific ambiguities, such as how much of the greenhouse gas nitrous oxide is created by the nitrogen fertilizer used to grow corn, have plagued the experiments. The results vary greatly since there is disagreement about what should and should not be taken into account in the calculation, but a study by David Pimental at Cornell University in New York came to the conclusion that burning maize ethanol produces more greenhouse gases than doing so.
Paragraph 6
The fact that producing maize for ethanol takes up land that is currently used to produce food for the world is another reason why an increasing number of people are opposed to biofuels. Veteran critic and campaigner on food issues Lester Brown claims that the amount of corn needed to fill a 44 tank with bioethanol just once could feed one person for a year. He believes that a rise in bioethanol would result in a race between the three billion people who live on less than $2 per day, many of whom are currently spending more than half their income on food, and the 800 million people who own cars worldwide.
Paragraph 7
Are we already wrong to believe that bioethanol may herald in a new era of environmentally friendly energy? It certainly appears that way given the current course of events, but it is not necessary. The goal of scientists is to develop a method for producing biofuels from waste biomass and non-food crops while preserving maize and other food crops for human use and doing so without harming the environment. Already, scientists are learning how to create ethanol from cellulose-rich organic debris. All green plants' primary structural element is cellulose. Its molecules are chains of sugars robust enough to form the cell walls of plants. These molecules could be fermented to produce ethanol if you could split them apart to liberate the sugars they hold. Creating such a technique could make it possible to use non-food resources like straw, crop byproducts like stalks, and hardwood chips, as well as switchgrass, a wild grass found in the Middle of the western along with eastern regions of the US nation. According to its proponents, these cellulose materials might produce twice as much ethanol per hectare as corn while using land that is currently neither commercially useful nor valuable in terms of the environment. Some people even believe that municipal waste like paper, cardboard, and leftover food may be repurposed. If the calculations add up, this could be the innovation that finally frees us from our reliance on oil without harming the planet.
Biofuels Reading Questions for Practice
The questions below are designed to test different IELTS Reading skills. Look for biofuel types, crops, countries, percentages, research findings, environmental effects, production methods, and future technologies. The wording may differ from the passage, so focus on meaning and paraphrases rather than searching for exactly the same words.
Questions 1–8: Matching Information
Read the statements and match each one with the correct paragraph.
Write the correct letter A–G next to Questions 1–8.
You may use any letter more than once.
1. An example of a country where biofuel use has become part of transport policy.
2. A criticism that producing biofuels may compete with food production.
3. A possible future source of ethanol that does not require food crops.
4. An explanation of why different countries would need different amounts of farmland to produce biofuels.
5. A study that questions whether corn ethanol actually reduces greenhouse gas emissions.
6. An explanation of why biofuels became less popular in the past.
7. Concerns that biofuel production could cause several environmental and social problems.
8. A description of the most common types of biofuels.
Questions 9–13: True/False/Not Given
Do the following statements agree with the information given in the passage?
Write:
TRUE if the statement agrees with the information.
FALSE if the statement contradicts the information.
NOT GIVEN if there is no information about this.
9. Rising oil prices have contributed to renewed interest in biofuels.
10. Brazil uses more than half of its agricultural land to produce fuel.
11. David Pimental's research concluded that burning corn ethanol can produce more greenhouse gases than fossil fuel combustion.
12. All experts agree that biofuels are an effective way to reduce global warming.
13. The passage states that ethanol made from municipal waste is already being used commercially on a large scale.
This section provides the Biofuels Reading Answers with location, keywords, and explanations for all 13 practice questions. The questions are based only on the passage above, and the explanations show how to connect the wording in each question with the relevant paragraph.
Answers 1–8: Matching Information
These questions require you to identify the paragraph containing specific information. Look for strong clues such as Brazil, agricultural land, research, greenhouse gases, gasoline, bioethanol, and cellulose.
Q1: An example of a country where biofuel use has become part of transport policy.
Answer: C — Paragraph 3
Explanation: Paragraph 3 discusses Brazil's use of sugarcane to produce ethanol. It also states that Brazilian legislation requires bioethanol to be blended with fuel at a rate of 20%. This shows that biofuel use has been incorporated into the country's transport policy.
Paraphrase:transport policy → legislation requiring bioethanol to be blended with fuel
Q2: A criticism that producing biofuels may compete with food production.
Answer: F — Paragraph 6
Explanation: Paragraph 6 explains that producing maize for ethanol uses land that is currently used to produce food. Lester Brown also argues that the use of corn for bioethanol could create competition between people who need food and people who own cars.
Answer Location: Paragraph 6
Keywords: maize, ethanol, land, food, cars
Paraphrase:compete with food production → land currently used to produce food
Q3: A possible future source of ethanol that does not require food crops.
Answer: G — Paragraph 7
Explanation: Paragraph 7 describes research into producing ethanol from waste biomass and non-food crops. It specifically mentions materials such as straw, crop stalks, hardwood chips and switchgrass.
Paraphrase:does not require food crops → preserving maize and other food crops for human use
Q4: An explanation of why different countries would need different amounts of farmland to produce biofuels.
Answer: D — Paragraph 4
Explanation: Paragraph 4 compares Brazil, the US, and Europe. Brazil needs only 3% of its agricultural area to produce 10% of its fuel consumption, while the US would need 30% and Europe 72%. The passage explains that differences in driving habits, crop production, population density, terrain and climate contribute to these differences.
Paraphrase:different amounts of farmland → 3%, 30%, and 72% of agricultural area
Q5: A study that questions whether corn ethanol actually reduces greenhouse gas emissions.
Answer: E — Paragraph 5
Explanation: Paragraph 5 discusses research comparing fossil fuel emissions with emissions from corn bioethanol. It mentions David Pimental's study, which concluded that burning maize ethanol produces more greenhouse gases than burning fossil fuels.
Answer Location: Paragraph 5
Keywords: study, corn bioethanol, greenhouse gases, David Pimental
Paraphrase:questions whether it reduces emissions → produces more greenhouse gases
Q6: An explanation of why biofuels became less popular in the past.
Answer: B — Paragraph 3
Explanation: Paragraph 3 explains that biofuels were used historically, including peanut oil and ethanol. However, as petroleum-based gasoline became available and cheaper to produce, biofuels lost popularity.
Answer Location: Paragraph 3
Keywords: petroleum-based gasoline, cheaper, biofuels, lost popularity
Paraphrase:became less popular → lost popularity
Q7: Concerns that biofuel production could cause several environmental and social problems.
Answer: B — Paragraph 2
Explanation: Paragraph 2 presents criticism from experts who question the environmental and social benefits of biofuels. They argue that biofuels could damage rainforests, reduce water supplies, eliminate species and increase food prices.
Answer Location: Paragraph 2
Keywords: rainforests, water supplies, species, food prices
Paraphrase:environmental and social problems → rainforests, water supplies, species and food prices
Q8: A description of the most common types of biofuels.
Answer: A — Paragraph 1
Explanation: Paragraph 1 defines biofuels as fuels made from organic material and names biodiesel and bioethanol as the two most popular types.
Answer Location: Paragraph 1
Keywords: biofuels, biodiesel, bioethanol, organic material
Paraphrase:most common types → two most popular biofuels
Answers 9–13: True/False/Not Given
For these questions, compare the complete meaning of each statement with the passage. Be especially careful with words such as all, more than half, agree, and already.
Q9: Rising oil prices have contributed to renewed interest in biofuels.
Answer: TRUE
Explanation: Paragraph 1 directly states that rising oil prices have made biofuels economically viable again after a long absence. This supports the statement that higher oil prices contributed to renewed interest.
Paraphrase:renewed interest → economically viable again
Q10: Brazil uses more than half of its agricultural land to produce fuel.
Answer: FALSE
Explanation: Paragraph 4 states that Brazil uses only 3% of its agricultural area to produce 10% of its total fuel consumption. Therefore, the statement that it uses more than half of its agricultural land directly contradicts the passage.
Paraphrase:more than half → contradicted by just 3%
Q11: David Pimental's research concluded that burning corn ethanol can produce more greenhouse gases than fossil fuel combustion.
Answer: TRUE
Explanation: Paragraph 5 states that a study by David Pimental at Cornell University concluded that burning maize ethanol produces more greenhouse gases than burning fossil fuels.
Answer Location: Paragraph 5
Keywords: David Pimental, maize ethanol, greenhouse gases
Q12: All experts agree that biofuels are an effective way to reduce global warming.
Answer: NOT GIVEN
Explanation: The passage presents different opinions about biofuels. Some supporters believe they can help reduce greenhouse gas emissions, while critics question their environmental benefits. However, the passage does not state that all experts agree that biofuels effectively reduce global warming.
Answer Location: Paragraph 2
Keywords: experts, environmental justifications, global warming
Paraphrase: The passage presents opposing views but does not state that all experts agree.
Q13: The passage states that ethanol made from municipal waste is already being used commercially on a large scale.
Answer: FALSE
Explanation: Paragraph 7 says that some people believe municipal waste such as paper, cardboard and leftover food may be repurposed. This describes a possible future use rather than stating that the process is already being used commercially on a large scale.
Answer Location: Paragraph 7
Keywords: municipal waste, paper, cardboard, leftover food, repurposed
Paraphrase:already being used → contradicted by the possibility that waste may be repurposed
The Biofuels passage combines environmental issues, scientific research, agriculture, energy production, and historical examples. A good approach is to identify the main topic of each paragraph first and then scan for the specific details needed by each question.
Identify Biofuel Types and Key Terms
Terms such as biodiesel, bioethanol, corn, sugarcane, cellulose, biomass, and switchgrass are useful scanning clues.
When you see one of these terms in a question, look for it or a related term in the passage. Technical terms are often easier to locate than broad words such as fuel or energy.
Track Countries, Numbers and Comparisons
The passage contains several important figures, including 3%, 10%, 30%, 72%, 20% and 15%.
These numbers can help you quickly find the relevant paragraph. For example, the comparison between Brazil, the US, and Europe appears in Paragraph 4.
Follow Cause-and-Effect Relationships
The passage contains several cause-and-effect relationships.
For example:
Rising oil prices → biofuels become economically viable again.
Biofuel production using food crops → concerns about food supplies.
Improved technology → possibility of producing ethanol from waste biomass.
When a question asks why something happened, search for the reason rather than simply matching a nearby keyword.
Distinguish Supporters from Critics
Paragraph 2 presents different views about biofuels. Supporters believe crops can absorb carbon dioxide and reduce net greenhouse gas emissions, while critics raise concerns about rainforests, water supplies, species and food prices.
Always check who is making the claim before selecting an answer.
Follow the Development of Biofuel Technology
The passage moves from current biofuels to possible future technologies. Paragraph 7 is especially important because it discusses producing ethanol from cellulose-rich organic waste and non-food crops.
Do not confuse a proposed future development with something that the passage says is already widely used.
Use Scientific Terms as Scanning Clues
Words such as greenhouse gases, nitrous oxide, nitrogen fertilizer, cellulose, ethanol, biomass and fermentation can help you locate specific information.
If you do not understand a technical term, read the surrounding sentence. The passage often explains its role through context.
Compare Different Biofuel Sources
The passage mentions several sources, including corn, sugarcane, peanut oil, straw, crop byproducts, hardwood chips, switchgrass and municipal waste.
Make sure you know which source is being discussed. A statement about corn ethanol may not apply to cellulose-based ethanol.
Look for Paraphrased Information
IELTS questions often use different words from the passage. For example:
became economically viable again → renewed interest
lost popularity → became less popular
agricultural area → farmland
produce more greenhouse gases → increase emissions
waste biomass → organic waste
food crops → crops used for human consumption
Focus on the meaning rather than looking for an exact word match.
Check the Context Before Choosing an Answer
Finding a matching word does not automatically make an answer correct.
Read the surrounding sentence and ask whether the passage actually supports the statement. This is especially important for True/False/Not Given questions, where one extra word can change the answer.
Distinguish Between True, False and Not Given
For statement-based questions:
TRUE: The passage supports the statement.
FALSE: The passage gives information that contradicts the statement.
NOT GIVEN: The passage does not provide enough information to decide.
Do not choose TRUE simply because the statement sounds reasonable. The answer must be supported by the passage.
Follow the Word Limit Carefully
If the question requires a short answer, follow instructions such as ONE WORD ONLY or NO MORE THAN TWO WORDS.
Check spelling carefully, especially for scientific terms, crops, countries and names.
Conclusion
Biofuel reading questions are designed by students so that they can develop various abilities needed for an IELTS Reading exam, such as locating particular information, comprehending science concepts, analyzing cause-and-effect relationships between things, comparing viewpoints on issues, and recognizing similar words or phrases.
If you need to compare these answers, then it is necessary for us to look at their positions as well as the words used within them. For solving issues related to the Biofuel backlash during an IELTS Reading exam, it is necessary to concentrate on sections discussing its drawbacks as well as potential negative effects thereof.
1. What does this Biofuels IELTS Reading passage cover?
The passage discusses biofuel, including ethanol and biodiesel production, its possible environmental benefits, criticism from scientists, food-security concerns and the use of agricultural residues such as corn stalks and wheat straw.
2. What are the main types of biofuels mentioned in the passage?
The main types mentioned are biodiesel and bioethanol. The passage also discusses materials used to produce ethanol, including corn, sugarcane, cellulosic biomass and non-food crops.
3. What type of questions are included in the Biofuels Reading Answers?
This practice set includes eight Matching Information questions and five True/False/Not Given questions. The answers are provided with explanations and locations in the passage to help you check your responses.
4. What is a criticism of biofuel?
Critics raise concerns about deforestation, water use, damage to wildlife and increased pressure on agricultural land. The passage also discusses concerns about the limited environmental benefits of some biofuel production methods.
5. What makes Brazil relevant to this article about biofuel production?
Brazil is discussed in relation to sugarcane-based ethanol production. The passage also compares agricultural land use and biofuel production in Brazil, the US and Europe.
6. What is said about corn ethanol in the passage?
The passage raises concerns about corn ethanol, including its environmental impact and the use of farmland for fuel production. It also refers to research examining its effect on greenhouse-gas emissions.
7. What could be the future of biofuel according to the passage?
Researchers are exploring ways to produce biofuel from waste biomass and non-food crops. Materials discussed include straw, crop stalks, hardwood chips and switchgrass.
8. What skills can you practise with these Biofuels Reading Answers?
You can practise scanning for key terms, identifying paraphrased information, understanding cause and effect, comparing different views, interpreting scientific information and distinguishing True, False and Not Given statements.
9. Where can I find the Biofuels Reading Answers with location?
The Biofuels Reading Answers with location are provided in the answer section of this page. Each explanation includes the relevant part of the passage along with keywords and supporting information to help you locate the answer.
10. Are these official IELTS Biofuels questions?
No. These are original practice questions, not official IELTS questions. They are designed to help you practise the reading skills and question types commonly used in IELTS Reading, including Biofuels IELTS Reading Answers and questions related to the Biofuels backlash IELTS Reading Answers.
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