Across
- 2. Engineers design pipes and filters to transport and cleanse this necessary liquid
- 5. Unused or discarded material.
- 6. Engineers build machines that clean dirty ____ and stop pollution from factories and cars.
- 7. Renewable energy captured by water
- 10. __________ Fuels, polluting fuel substances that release harmful gases
- 11. Renewable energy captured by the sun
- 12. Renewable energy captured by air blowing into turbines
- 13. sources of energy where there is only a certain amount
Down
- 1. places that store trash for hundreds of years
- 3. Clean _________, Engineers make solar panels and wind turbines to capture this and store it
- 4. Forests, animals, and rivers
- 8. __________ in, means speaking up
- 9. using less of things