Which characteristic addresses the environmental impact over the lifecycle of the material?

• A. Sustainability
• B. Availability
• C. Safety in Use
• D. Relative Cost

Answer: (A)

Sustainability is about how a material impacts the environment throughout its entire life cycle—from extraction and processing to manufacture, use, and end-of-life options like recycling or disposal. It focuses on reducing resource use, energy consumption, emissions, and waste, while promoting reuse and recyclability. Because of this broad, lifecycle-oriented perspective, it best addresses the environmental footprint of a material over time.

Availability deals with how easily a material can be sourced, safety in use with protecting people during handling or use, and relative cost with the economic aspect, none of which inherently cover the environmental impact across the full life cycle.