Which eco-friendly product has ABC developed?

• A. Green-Bloc, a lightweight additive.
• B. Recycled-concrete blend that reduces emissions.
• C. Bio-Crete, based on bio-based binders.
• D. Eco-Crete, which uses recycled products as core components of concrete.

Answer: (D)

The main idea being tested is how a product achieves true eco-friendliness by changing the material make-up rather than just adding greener features. Eco-Crete stands out because it uses recycled products as the core components of the concrete itself, not just as additives or secondary blends. This means the product reduces virgin material use, lowers embodied energy, and cuts waste at the source, delivering environmental benefits throughout its lifecycle. The other options describe greener aspects—an additive, a recycled-aggregate blend, or bio-based binders—but they don’t substitute the main constituents of the product, which is what makes Eco-Crete the strongest example of an eco-friendly development.