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US Green Building Council LEED-AP-ID+C Exam - Topic 5 Question 21 Discussion

Which material would have the largest contribution to Materials and Resources Credit, Building Product Disclosure and Optimization- Sourcing of Raw Materials, Option 2. Leadership Extraction Practices?
B) 10% Rainforest Alliance Certified furniture with a total cost of $30,000 USD
A) 75% Rainforest Alliance Certified flooring with a total cost of $3,000 USD
C) 50% Rainforest Alliance Certified wood veneer with a total cost of $5,000 USD
D) 100% Rainforest Alliance Certified wheatboard with a total cost of $2,000 USD

US Green Building Council LEED-AP-ID+C Exam - Topic 5 Question 21 Discussion

Actual exam question for US Green Building Council's LEED-AP-ID+C exam
Question #: 21
Topic #: 5
[All LEED-AP-ID+C Questions]

Which material would have the largest contribution to Materials and Resources Credit, Building Product Disclosure and Optimization- Sourcing of Raw Materials, Option 2. Leadership Extraction Practices?

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Suggested Answer: B

In the context of LEED AP ID+C V4, for the Building Product Disclosure and Optimization - Sourcing of Raw Materials, Option 2: Leadership Extraction Practices, the contribution is calculated based on the cost of the product and the percentage of certification. The furniture option, despite having a lower percentage of certification, has the highest total cost, which results in the largest contribution by cost to the credit.


by Wayne at Jan 05, 2026, 05:16 AM

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Pedro
4 months ago
True, but D's total contribution is solid with full certification.
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Carissa
4 months ago
But A has a higher percentage of certified material.
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Katlyn
4 months ago
Agreed! The cost is low too. Great value.
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Colton
5 months ago
I think D is the best choice. 100% certified is impressive.
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Rolande
5 months ago
C) is a solid option too, but A) might edge it out.
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Thurman
5 months ago
B) seems way too expensive for just 10% certified.
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Beatriz
5 months ago
Really? I thought cost would play a bigger role here.
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William
5 months ago
I think D) is the best choice! 100% certified is impressive.
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Cecilia
5 months ago
A) has the highest percentage of certified material.
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Catalina
6 months ago
Wheatboard? Really? That's so 90s. I'd go with the furniture option, it's more modern.
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Dahlia
6 months ago
Option C. 50% Rainforest Alliance Certified wood veneer is a good compromise between cost and certification.
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Tiffiny
6 months ago
Haha, who even uses wheatboard these days? I'd go with the flooring option, it's more practical.
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Tesha
7 months ago
I agree, the wheatboard option seems to have the highest percentage of certified material.
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Jamie
7 months ago
Option D. 100% Rainforest Alliance Certified wheatboard with a total cost of $2,000 USD seems like the best choice here.
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Zita
7 months ago
I think the wheatboard option might be the best choice, but I need to double-check how the certification levels affect the credits.
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Beatriz
7 months ago
I feel like the flooring option could be significant since it's 75%, but I wonder if the total cost impacts the decision more than I thought.
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Xochitl
7 months ago
I remember a practice question where the total cost played a big role, but I can't recall if it was the only factor.
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Nettie
7 months ago
I think the option with 100% certification might have the largest contribution, but I'm not entirely sure how the percentages weigh in.
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Roslyn
8 months ago
I'm leaning towards option C. 50% Rainforest Alliance certified wood veneer with a total cost of $5,000 could be a good balance between the percentage of certified material and the overall cost.
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Dona
8 months ago
Based on the information provided, I think option D might be the best choice. 100% Rainforest Alliance certified wheatboard with a total cost of $2,000 seems like it would have the largest contribution to the credit.
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Mitzie
8 months ago
I'm a bit confused by the wording of the question. Does "largest contribution" mean the highest percentage of Rainforest Alliance certified material, or the highest total cost?
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Yuette
8 months ago
Okay, let me think this through. I need to identify which material would have the largest contribution to the credit. The key seems to be the Rainforest Alliance certification and the percentage of each material.
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Margot
8 months ago
Hmm, this seems like a tricky one. I'll need to carefully consider the details of the Materials and Resources Credit and the specific requirements for Option 2.
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Adell
2 months ago
D is 100%! That must count for something significant.
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Teddy
2 months ago
But B has a higher total cost. Maybe that matters more?
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Hui
4 months ago
I think A could be the best choice. 75% is a strong percentage.
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