Answer: minimise hazardous substances.
- A maximise waste output
- B minimise hazardous substances
- C deliberately raise toxicity
- D consume far more energy
Correct answer: B. minimise hazardous substances
Explanation: Green chemistry aims to prevent pollution by reducing or eliminating hazardous substances and waste.
Classical smog is a reducing mixture of SO₂ and fog, while photochemical smog is an oxidising mixture generated by UV-driven reactions of NOx and hydrocarbons.
Concept context
Understand how human activities alter the atmosphere, water, and soil. Covers air pollutants, smog types, ozone depletion, acid rain, greenhouse effect, water and soil pollution, and the principles of green chemistry.