Complete the notes below.
Write ONE WORD ONLY for each answer.
Marine renewable energy (ocean energy)
Introduction
More energy required because of growth in population and 31.
What’s needed:
- renewable energy sources
- methods that won’t create pollution
Wave energy
- Advantage: waves provide a 32. source of renewable energy
Electricity can be generated using offshore or onshore systems
Onshore systems may use a reservoir
Problems:
- waves can move in any 33.
- movement of sand, etc. on the 34. of the ocean may be affected
Tidal energy
Tides are more 35. than waves
Planned tidal lagoon in Wales:
- will be created in a 36. at Swansea
- breakwater (dam) containing 16 turbines
- rising tide forces water through turbines, generating electricity
- stored water is released through 37. , driving the turbines in the reverse direction
Advantages:
- not dependent on weather
- no 38. is required to make it work
- likely to create a number of 39.
Problem:
- may ham fish and birds, e.g. by affecting 40. and building up silt
