Q.Define

Step 1. Define green chemistry (Section 16.1). Green Chemistry is the use of chemistry for pollution prevention, through environmentally conscious design of chemical products and processes that reduce or eliminate the use or generation of hazardous substances. It is also described, more generally, as an approach to chemistry that aims to maximise efficiency and minimise hazardous effects on human health and the environment.

Step 2. Define sustainable development (Section 16.2). Sustainable development is development that meets the needs of the present without compromising the ability of future generations to meet their own needs; the concept has continued to evolve to also emphasise protecting the world's resources.

Step 3. Note the link between the two. Green chemistry is presented as the practical mechanism by which sustainable development is achieved in the chemical industry -- adopting its twelve principles is how the industry works toward meeting present needs without compromising future ones.

Direct recall of both textbook definitions (Sections 16.1 and 16.2) plus the link the chapter draws between them.

• Giving only a vague description ('chemistry that is good for the environment') instead of the specific pollution-prevention-through-design definition.
• Omitting the 'without compromising future generations' clause of the sustainable development definition, which is its defining feature.