Across
- 2. a poisonous form of oxygen
- 4. an idea that is wrong because it has been based on a failure to understand a situation
- 6. the process of collecting and changing old paper, glass, plastic, etc
- 7. damage caused to water, air, etc.
Down
- 1. the study and knowledge of the practical, especially industrial, use of scientific discoveries
- 3. waste a situation in which no waste material is produced
- 5. any basic substance that is used in or produced by a reaction involving changes to atoms or molecules