Across
- 2. English for 'Wasserkraft'
- 3. another verb for 'produce'
- 7. English for 'Biomasse'
- 9. a device that uses a compressible refrigerant to transfer heat from one body, as the ground, air, or water, to another body, as a building, with the process being reversible
- 10. English for 'Brennstoffzelle'
- 12. an urban area that has been developed with a high level of technological advancement
- 13. English for 'erneuerbar'
- 14. an adjective relating to the heat of the earth's interior
Down
- 1. English for 'Atomkraft'
- 4. the use of the rise and fall of the tides of oceans to generate electric power
- 5. a waste treatment process that involves the combustion of organic substances contained in waste materials
- 6. English for 'Umweltverschmutzung'
- 8. English for 'Technik'
- 11. another noun for 'rubbish'