Renewable energy

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Across
  1. 2. Large black rock
  2. 4. May have an impact on wildlife?(5,5)
  3. 6. power built in an estuary?(5,5)
  4. 7. panel) What goes on your roof and powers a house?(5,5)
  5. 8. powerIt needs wind?(5,5)
  6. 9. It is cheap and readily available?(7)
Down
  1. 1. power) It is expensive?(5,5)
  2. 3. best crossword maker👋👋😀🤩
  3. 4. Can generate electricity quickly at times of high demand?(17)
  4. 5. holds back the water?(3)