When using Global Warming Potential to compare products, you should compare similar products for accurate results.

When using Global Warming Potential to compare products, you should compare similar products for accurate results.

• A. Always compare different product categories
• B. Compare similar products
• C. Comparison is unnecessary
• D. Compare only the most expensive products

Answer: (B)

Global Warming Potential converts emissions of different greenhouse gases into a common unit (CO2-equivalents), so you can compare climate impacts. To get accurate results, compare products that are similar in function and context—same use, same functional unit, and similar life-cycle boundaries. When the products serve the same purpose and are assessed the same way, the GWP reflects true differences in their emissions from production, use, and end-of-life rather than differences in category or application. Comparing dissimilar products mixes different services or materials, making the results misleading. Price or expense level isn’t a reliable proxy for environmental impact, so focusing on similar products yields a fair, meaningful comparison.

Global Warming Potential converts emissions of different greenhouse gases into a common unit (CO2-equivalents), so you can compare climate impacts. To get accurate results, compare products that are similar in function and context—same use, same functional unit, and similar life-cycle boundaries. When the products serve the same purpose and are assessed the same way, the GWP reflects true differences in their emissions from production, use, and end-of-life rather than differences in category or application. Comparing dissimilar products mixes different services or materials, making the results misleading. Price or expense level isn’t a reliable proxy for environmental impact, so focusing on similar products yields a fair, meaningful comparison.