What is the most significant disadvantage of renewable energy sources?

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A High pollution levels.
B They will run out within a few years.
C Unreliable supply and intermittency (e.g., sun does not shine at night).
D They are faster to consume than create.

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Answer: C. Unreliable supply and intermittency (e.g., sun does not shine at night).

Answer: c) Unreliable supply and intermittency.
Explanation: While renewable sources are clean, they are often dependent on weather conditions (like wind or sun) and need storage solutions to provide power when generation is low.

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What is the most significant disadvantage of renewable energy sources?

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