Question detail
How can improving energy efficiency contribute to reducing carbon footprints?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Carbon dioxide and methane as greenhouse gases
Question
- A. By increasing energy consumption
- B. By decreasing the amount of energy needed for the same output
- C. By promoting the use of fossil fuels
- D. By reducing the number of renewable energy sources
Answer
The correct option is By decreasing the amount of energy needed for the same output. This answer is correct because it matches the approved learning objective to evaluate methods for reducing carbon footprints in terms of cost, practicality and effectiveness in the subtopic The carbon footprint and its reduction.
Explanation
The correct option is By decreasing the amount of energy needed for the same output. By decreasing the amount of energy needed for the same output is correct because it directly supports the approved learning objective to evaluate methods for reducing carbon footprints in terms of cost, practicality and effectiveness. This belongs to the subtopic The carbon footprint and its reduction within Carbon dioxide and methane as greenhouse gases, so the explanation must stay tied to that curriculum context. The other options are incorrect because they either do not answer this learning objective, use a vague statement, or move away from The carbon footprint and its reduction.
Common mistake
Misunderstanding Cost vs. Effectiveness
Students often confuse the cost of a method for reducing carbon footprints with its effectiveness, assuming that cheaper methods are always less effective.
To fix this, students should evaluate both the cost and the effectiveness of each method separately, considering how each method impacts carbon emissions and its overall feasibility.
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