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Type of enegry sources - Coggle Diagram

- - - - We have to rely on the weather
      - it isn't always available and it isn't cheap.
    - - Wind power is a renewable source of energy because it is free.
      - It comes from wind. It's abundant
  - - - Solar power is a renewable source of energy because it comes from the sun.
      - It's abundant, clean and safe
    - - it isn't cheap.
      - We have to rely on the weather
  - - - Hydro power is a renewable source of energy because it comes from water.
      - It is cheap and plentiful
    - - Unfortunately, dams can only be built in certain areas.
- - - - It can be used to power machinery
    - - it also pollutes the environment.
      - It's expensive
  - - - Coal and natural gas is a non-renewable source of energy because it can be used up
      - It' s very cheap
    - - it's polluting
      - It's not friendly to the environment.