Across
- 2. used to produce solar energy
- 4. energy produced by the sea
- 5. company in charge of peat production
- 7. consequence of burning fossil fuels
- 9. a bog, 8 metres deep
- 10. produced by sun
- 11. an organisation of oil producing countries
Down
- 1. produced from heat of earth
- 3. an oil producing country
- 6. gas field of west coast of ireland
- 8. an energy source that won't run out