Across
- 2. based on untested ideas or techniques and not yet established or finalized.
- 4. a change in global or regional climate patterns
- 5. The water and human wastes that are washed down sinks, toilets, and showers
- 7. resources that cannot be replaced within a human life
- 9. an electric car that runs on energy from the sun
- 11. Fuel for cars made from plant oils.
- 12. Transportation service for the general public
Down
- 1. a car with a gasoline engine and an electric motor, each of which can propel it
- 3. A natural resource that can be replaced at the same rate at which the resource is consumed
- 6. A fuel that can be made from sugar cane
- 8. the contamination of air by harmful substances including gases and smoke
- 10. rain containing high amounts of chemical pollutants